Heptane, 4-methyl-
- Formula: C8H18
- Molecular weight: 114.2285
- IUPAC Standard InChIKey: CHBAWFGIXDBEBT-UHFFFAOYSA-N
- CAS Registry Number: 589-53-7
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: 4-Methylheptane; (n-C3H7)2CHCH3
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IR Spectrum
Go To: Top, Mass spectrum (electron ionization), Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Gas Phase Spectrum
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Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.
Additional Data
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Owner | NIST Standard Reference Data Program Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | NIST Mass Spectrometry Data Center |
State | gas |
Instrument | HP-GC/MS/IRD |
Mass spectrum (electron ionization)
Go To: Top, IR Spectrum, Gas Chromatography, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | NIST Mass Spectrometry Data Center, 1990. |
NIST MS number | 113916 |
Gas Chromatography
Go To: Top, IR Spectrum, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | OV-101 | 40. | 766.8 | Chen, Liang, et al., 2001 | He; Column length: 50. m; Column diameter: 0.25 mm |
Capillary | OV-101 | 60. | 767.2 | Chen, Liang, et al., 2001 | He; Column length: 50. m; Column diameter: 0.25 mm |
Capillary | Squalane | 100. | 767. | Heinzen, Soares, et al., 1999 | |
Capillary | OV-101 | 0. | 766. | Skrbic, 1997 | |
Packed | Squalane | 78.5 | 768.2 | Zhang and Lu, 1996 | |
Capillary | CP Sil 2 | 60. | 765.8 | Estel, Mohnke, et al., 1995 | 100. m/0.25 mm/0.25 μm |
Capillary | Squalane | 25. | 766. | Hilal, Carreira, et al., 1994 | |
Capillary | OV-1 | 60. | 768. | Engewald, Maurer, et al., 1989 | |
Capillary | OV-101 | 40. | 766. | Laub and Purnell, 1988 | |
Capillary | OV-101 | 60. | 767. | Laub and Purnell, 1988 | |
Capillary | OV-101 | 80. | 767. | Laub and Purnell, 1988 | |
Capillary | Squalane | 50. | 766.9 | Lunskii and Paizanskaya, 1988 | He; Column length: 50. m; Column diameter: 0.22 mm |
Capillary | Squalane | 70. | 767.9 | Lunskii and Paizanskaya, 1988 | He; Column length: 50. m; Column diameter: 0.22 mm |
Capillary | OV-101 | 40. | 767.5 | Boneva and Dimov, 1986 | 100. m/0.27 mm/0.9 μm |
Capillary | OV-101 | 50. | 767.6 | Boneva and Dimov, 1986 | 100. m/0.27 mm/0.9 μm |
Capillary | OV-101 | 60. | 767.8 | Boneva and Dimov, 1986 | 100. m/0.27 mm/0.9 μm |
Capillary | OV-101 | 70. | 768.0 | Boneva and Dimov, 1986 | 100. m/0.27 mm/0.9 μm |
Capillary | OV-101 | 30. | 766. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 40. | 766. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 50. | 766. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 60. | 767. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 70. | 767. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 80. | 767. | Chien, Furio, et al., 1983 | |
Capillary | DB-1 | 60. | 768.1 | Lubeck and Sutton, 1983 | Column length: 60. m; Column diameter: 0.264 mm |
Capillary | DB-1 | 60. | 768.1 | Lubeck and Sutton, 1983 | 60. m/0.259 mm/1. μm |
Capillary | OV-101 | 50. | 768. | Johansen and Ettre, 1982 | 100. m/0.27 mm/0.20 μm |
Capillary | OV-101 | 50. | 768. | Johansen and Ettre, 1982 | 55. m/0.27 mm/0.9 μm |
Capillary | SF-96 | 50. | 767. | Johansen and Ettre, 1982 | 91.4 m/0.31 mm/0.20 μm |
Capillary | OV-1 | 60. | 757. | Nijs and Jacobs, 1981 | He; Column length: 150. m; Column diameter: 0.50 mm |
Packed | Triacontane | 80. | 768. | Castello and D'Amato, 1979 | He, Chromosorb W AW (60-80 mesh); Column length: 3. m |
Packed | Squalane | 80. | 767. | Castello and D'Amato, 1979 | He, Chromosorb W AW (60-80 mesh); Column length: 3. m |
Capillary | Squalane | 70. | 767.2 | Nabivach and Kirilenko, 1979 | N2; Column length: 50. m |
Capillary | Squalane | 70. | 768.1 | Nabivach and Kirilenko, 1979 | N2; Column length: 50. m |
Capillary | Squalane | 60. | 767. | Chretien and Dubois, 1976 | |
Capillary | Squalane | 100. | 766. | Lulova, Leont'eva, et al., 1976 | He; Column length: 120. m; Column diameter: 0.25 mm |
Capillary | Squalane | 100. | 766. | Lulova, Leont'eva, et al., 1976 | He; Column length: 120. m; Column diameter: 0.25 mm |
Capillary | Squalane | 50. | 767. | Rijks and Cramers, 1974 | N2; Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Squalane | 70. | 768. | Rijks and Cramers, 1974 | N2; Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Apiezon L | 100. | 765. | Rappoport and Gäumann, 1973 | |
Capillary | Squalane | 40. | 767. | Schomburg and Dielmann, 1973 | Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Vacuum Grease Oil (VM-4) | 35. | 766. | Sidorov, Petrova, et al., 1972 | |
Capillary | Vacuum Grease Oil (VM-4) | 45. | 766. | Sidorov, Petrova, et al., 1972 | |
Capillary | Vacuum Grease Oil (VM-4) | 50. | 766. | Sidorov, Petrova, et al., 1972 | |
Capillary | Vacuum Grease Oil (VM-4) | 58. | 766. | Sidorov, Petrova, et al., 1972 | |
Capillary | Vacuum Grease Oil (VM-4) | 68. | 767. | Sidorov, Petrova, et al., 1972 | |
Capillary | Squalane | 70. | 767. | Dimov and Schopov, 1971 | Column length: 100. m; Column diameter: 0.25 mm |
Packed | Squalane | 100. | 769. | Robinson and Odell, 1971 | N2, Embacel; Column length: 3.0 m |
Packed | Squalane | 50. | 767.5 | Takács, Szita, et al., 1971 | N2, Chromosorb W; Column length: 3. m |
Packed | SE-30 | 80. | 769. | Mitra and Saha, 1970 | N2 |
Packed | Squalane | 25. | 767. | Mitra and Saha, 1970 | N2 |
Packed | Squalane | 80. | 768. | Mitra and Saha, 1970 | N2 |
Capillary | Squalane | 40. | 767. | Matukuma, 1969 | N2; Column length: 91.4 m; Column diameter: 0.25 mm |
Packed | Squalane | 27. | 766. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 49. | 767. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 67. | 767. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 86. | 768. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 30. | 767.5 | Tourres, 1967 | H2; Column length: 10. m |
Packed | Squalane | 50. | 767.5 | Tourres, 1967 | H2; Column length: 10. m |
Capillary | Squalane | 30. | 767. | Tourres, 1967, 2 | H2; Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Squalane | 50. | 768. | Tourres, 1967, 2 | H2; Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Squalane | 70. | 768. | Tourres, 1967, 2 | H2; Column length: 100. m; Column diameter: 0.25 mm |
Packed | SE-30 | 70. | 771. | Widmer, 1967 | Diatoport S; Column length: 7.9 m |
Packed | SE-30 | 70. | 771. | Widmer, 1967 | Diatoport S; Column length: 7.9 m |
Packed | Squalane | 100. | 769. | Evans, 1966 | Untreated celite; Column length: 1.8 m |
Packed | Squalane | 40. | 767. | Evans, 1966 | Untreated celite; Column length: 1.8 m |
Packed | Squalane | 55. | 768. | Evans, 1966 | Untreated celite; Column length: 1.8 m |
Packed | Squalane | 60. | 768. | Evans, 1966 | Untreated celite; Column length: 1.8 m |
Packed | Squalane | 70. | 768. | Evans, 1966 | Untreated celite; Column length: 1.8 m |
Packed | Squalane | 80. | 768. | Evans, 1966 | Untreated celite; Column length: 1.8 m |
Kovats' RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | SE-54 | 764. | Rembold, Wallner, et al., 1989 | 30. m/0.25 mm/0.25 μm, He, 0. C @ 12. min, 12. K/min; Tend: 250. C |
Capillary | OV-101 | 762. | Hayes and Pitzer, 1982 | 110. m/0.25 mm/0.20 μm, He, 1. K/min; Tstart: 35. C; Tend: 200. C |
Capillary | Apiezon L | 763. | Louis, 1971 | N2, 1. K/min; Column length: 50. m; Column diameter: 0.25 mm; Tstart: 60. C |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Petrocol DH-100 | 765.6 | Haagen-Smit Laboratory, 1997 | He; Column length: 100. m; Column diameter: 0.2 mm; Program: 5C(10min) => 5C/min => 50C(48min) => 1.5C/min => 195C(91min) |
Capillary | DB-1 | 770. | Hoekman, 1993 | 60. m/0.32 mm/1.0 μm, He; Program: -40 C for 12 min; -40 - 125 C at 3 deg.min; 125-185 C at 6 deg/min; 185 - 220 C at 20 deg/min; hold 220 C for 2 min |
Kovats' RI, polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | Carbowax 20M | 130. | 764. | Widmer, 1967 | Diatoport P; Column length: 7.9 m |
Packed | Carbowax 20M | 70. | 768. | Widmer, 1967 | Diatoport P; Column length: 7.9 m |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Petrocol DH | 768.4 | Censullo, Jones, et al., 2003 | 50. m/0.25 mm/0.5 μm, He, 35. C @ 10. min, 3. K/min, 200. C @ 10. min |
Capillary | SPB-1 | 762.88 | LECO Corporation, 2003 | 30. m/0.25 mm/0.25 μm, 40. C @ 2. min, 10. K/min, 250. C @ 2. min |
Capillary | SPB-1 | 763.26 | LECO Corporation, 2003 | 30. m/0.25 mm/0.25 μm, 40. C @ 2. min, 10. K/min, 250. C @ 2. min |
Capillary | DB-1 | 760.4 | Sun and Stremple, 2003 | 30. m/0.25 mm/0.25 μm, He, 3. K/min; Tstart: 40. C; Tend: 325. C |
Capillary | DB-5 | 764.6 | Xu, van Stee, et al., 2003 | 30. m/0.25 mm/1. μm, He, 2.5 K/min; Tstart: 50. C; Tend: 200. C |
Capillary | OV-101 | 765.6 | Yin, Liu, et al., 2001 | N2, 1. K/min; Column length: 80. m; Column diameter: 0.22 mm; Tstart: 30. C; Tend: 130. C |
Capillary | PONA | 762.5 | Martos, Saraullo, et al., 1997 | 50. m/0.2 mm/0.5 μm, 35. C @ 0.5 min, 1. K/min, 220. C @ 8. min |
Capillary | PONA | 762.5 | Martos, Saraullo, et al., 1997 | 50. m/0.2 mm/0.5 μm, 35. C @ 0.5 min, 1. K/min, 220. C @ 8. min |
Capillary | Petrocol DH | 763.78 | Subramaniam, Bochniak, et al., 1994 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | Petrocol DH | 763.91 | Subramaniam, Bochniak, et al., 1994 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | Ultra-1 | 767. | Olson, Sinkevitch, et al., 1992 | 4. K/min; Tstart: -40. C; Tend: 230. C |
Capillary | Petrocol DH | 764.38 | White, Douglas, et al., 1992 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | Petrocol DH | 764.57 | White, Douglas, et al., 1992 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | Petrocol DH | 765. | White, Hackett, et al., 1992 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | HP-1 | 767.7 | Bangjie, Xijian, et al., 1987 | N2, 10. K/min; Column length: 25. m; Column diameter: 0.2 mm; Tstart: 30. C |
Capillary | HP-1 | 766.8 | Bangjie, Xijian, et al., 1987 | N2, 2. K/min; Column length: 25. m; Column diameter: 0.2 mm; Tstart: 30. C |
Capillary | HP-1 | 768.5 | Bangjie, Xijian, et al., 1987 | N2, 30. C @ 5. min, 5. K/min; Column length: 25. m; Column diameter: 0.2 mm |
Capillary | Ultra-1 | 767.75 | Haynes and Pitzer, 1985 | 50. m/0.22 mm/0.33 μm, He, 1. K/min; Tstart: -30. C; Tend: 240. C |
Capillary | Ultra-1 | 768.05 | Haynes and Pitzer, 1985 | 50. m/0.22 mm/0.33 μm, He, 2. K/min; Tstart: -30. C; Tend: 240. C |
Capillary | Ultra-1 | 768.28 | Haynes and Pitzer, 1985 | 50. m/0.22 mm/0.33 μm, He, 3. K/min; Tstart: -30. C; Tend: 240. C |
Capillary | Ultra-2 | 767.16 | Haynes and Pitzer, 1985 | 50. m/0.22 mm/0.33 μm, He, 1. K/min; Tstart: -30. C; Tend: 240. C |
Capillary | Ultra-2 | 767.53 | Haynes and Pitzer, 1985 | 50. m/0.22 mm/0.33 μm, He, 2. K/min; Tstart: -30. C; Tend: 240. C |
Capillary | Ultra-2 | 767.77 | Haynes and Pitzer, 1985 | 50. m/0.22 mm/0.33 μm, He, 3. K/min; Tstart: -30. C; Tend: 240. C |
Capillary | OV-101 | 762. | Hayes and Pitzer, 1981 | 108. m/0.25 mm/0.2 μm, 1. K/min; Tstart: 35. C; Tend: 200. C |
Van Den Dool and Kratz RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Methyl Silicone | 777.73 | Hassoun, Pilling, et al., 1999 | 50. m/0.25 mm/1. μm, He; Program: -50C(2min) => 49.9C/min => 35C(10min) => 3C/min => 200C(2min) => 40C/min => 240C(30min) |
Capillary | OV-101 | 756. | Wu and Lu, 1984 | Program: not specified |
Normal alkane RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | Methyl Silicone | 50. | 767. | N/A | N2; Column length: 74.6 m; Column diameter: 0.28 mm |
Capillary | OV-101 | 50. | 767. | Wu and Lu, 1984, 2 | |
Capillary | OV-101 | 70. | 768. | Wu and Lu, 1984, 2 | |
Capillary | Squalane | 100. | 768. | Dimov N., 1976 | |
Capillary | Squalane | 70. | 768. | Dimov N., 1976 | |
Capillary | Squalane | 86. | 759. | Vigdergauz and Martynov, 1971 | He; Column length: 150. m; Column diameter: 0.35 mm |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Polydimethyl siloxane: CP-Sil 5 CB | 768. | Bramston-Cook, 2013 | 60. m/0.25 mm/1.0 μm, Helium, 45. C @ 1.45 min, 3.6 K/min, 210. C @ 2.72 min |
Capillary | Petrocol DH | 767. | Supelco, 2012 | 100. m/0.25 mm/0.50 μm, Helium, 20. C @ 15. min, 15. K/min, 220. C @ 30. min |
Capillary | PONA | 768. | Zhang, Ding, et al., 2009 | 50. m/0.20 mm/0.50 μm, Nitrogen, 35. C @ 15. min, 2. K/min, 200. C @ 10. min |
Capillary | OV-1 | 765.9 | Krkosova, Kubinec, et al., 2007 | 100. m/0.32 mm/0.25 μm, Helium, 5. K/min, 310. C @ 5. min; Tstart: 30. C |
Capillary | Petrocol DH | 765. | Sojak, Kubinec, et al., 2006 | 150. m/0.25 mm/1.0 μm, 1. K/min; Tstart: 40. C; Tend: 300. C |
Capillary | SE-54 | 770. | Guan, Li, et al., 1995 | 60. C @ 2. min, 4. K/min; Column length: 50. m; Column diameter: 0.32 mm; Tend: 200. C |
Capillary | DB-1 | 769. | Ciccioli, Cecinato, et al., 1992 | 60. m/0.32 mm/1.2 μm, He, 30. C @ 10. min, 3. K/min; Tend: 240. C |
Capillary | DB-5 | 767. | Berdague, Denoyer, et al., 1991 | 60. m/0.32 mm/1.0 μm, He, 3. K/min; Tstart: 40. C; Tend: 240. C |
Packed | Apiezon L | 762. | Dahlmann, Köser, et al., 1979 | Chromosorb G-AW-DMCS, 10. K/min; Column length: 2. m; Tstart: 25. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Methyl Silicone | 768. | Chen and Feng, 2007 | Program: not specified |
Capillary | Methyl Silicone | 767. | Feng and Mu, 2007 | Program: not specified |
Capillary | Methyl Silicone | 769. | Blunden, Aneja, et al., 2005 | 60. m/0.32 mm/1.0 μm, Helium; Program: -50 0C (2 min) 8 0C/min -> 200 0C (7.75 min) 25 0C -> 225 0C (8 min) |
Capillary | OV-101 | 767. | Du and Liang, 2003 | Program: not specified |
Capillary | Polydimethyl siloxane | 767. | Junkes, Castanho, et al., 2003 | Program: not specified |
Capillary | Polydimethyl siloxanes | 766. | Yin, Guo, et al., 2001 | Program: not specified |
Capillary | Methyl Silicone | 765. | Spieksma, 1999 | Program: not specified |
Capillary | SE-54 | 767. | Zhu and He, 1999 | Program: not specified |
Capillary | SE-54 | 768. | Zhu and He, 1999 | Program: not specified |
Capillary | Methyl Silicone | 768. | Xu, Chu, et al., 1995 | Program: not specified |
Capillary | DB-1 | 767. | Ciccioli, Cecinato, et al., 1994 | 60. m/0.32 mm/0.25 μm; Program: not specified |
Capillary | OV-101 | 766. | Skrbic and Cvejanov, 1993 | Program: not specified |
Capillary | Squalane | 764. | Petrov, 1984 | Program: not specified |
Packed | Apieson L | 770. | Kojima, Fujii, et al., 1980 | Chromosorb W; Column length: 20. m; Program: not specified |
Packed | SE-30 | 770. | Robinson and Odell, 1971 | N2, Chromosorb W; Column length: 6.1 m; Program: 50C910min) => 20C/min => 90(6min) => 10C/min => 150C(hold) |
Packed | Squalane | 775. | Robinson and Odell, 1971 | N2, Embacel; Column length: 3.0 m; Program: 25C(5min) => 2C/min => 35 => 4C/min => 95C(hold) |
Packed | Squalane | 775. | Robinson and Odell, 1971, 2 | Embacel; Column length: 3.0 m; Program: 25C(5min) => 2C/min(5min) => 4C/min(15min) => (hold at 95C) |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 790. | Kim. J.H., Ahn, et al., 2004 | 60. m/0.25 mm/0.25 μm, Helium; Program: 60 0C (3 min) 2 0C/min -> 150 0C 4 0C/min -> 200 0C |
References
Go To: Top, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chen, Liang, et al., 2001
Chen, J.P.; Liang, X.M.; Zhang, Q.; Zhang, L.F.,
Prediction of GC retention values under various column temperature conditions from temperature programmed data,
Chromatographia, 2001, 53, 9/10, 539-547, https://doi.org/10.1007/BF02491619
. [all data]
Heinzen, Soares, et al., 1999
Heinzen, V.E.F.; Soares, M.F.; Yunes, R.A.,
Semi-empirical topological method for the prediction of the chromatographic retention of cis- and trans-alkene isomers and alkanes,
J. Chromatogr. A, 1999, 849, 2, 495-506, https://doi.org/10.1016/S0021-9673(99)00530-0
. [all data]
Skrbic, 1997
Skrbic, B.D.,
Unified retention concept -- statistical treatment of Kováts retention index,
J. Chromatogr. A, 1997, 764, 2, 257-264, https://doi.org/10.1016/S0021-9673(96)00955-7
. [all data]
Zhang and Lu, 1996
Zhang, X.; Lu, P.,
Unified equation between Kováts indices on different stationary phases for select types of compounds,
J. Chromatogr. A, 1996, 731, 1-2, 187-199, https://doi.org/10.1016/0021-9673(95)01213-3
. [all data]
Estel, Mohnke, et al., 1995
Estel, D.; Mohnke; Biermans; Rotzsche,
The analysis of C4-C11 hydrocarbons in naphtha and reformate with a new apolar fused silica column,
J. Hi. Res. Chromatogr., 1995, 18, 7, 403-412, https://doi.org/10.1002/jhrc.1240180703
. [all data]
Hilal, Carreira, et al., 1994
Hilal, S.H.; Carreira, L.A.; Karickhoff, S.W.; Melton, C.M.,
Estimation of Gas-Liquid Chromatographic Retention Times from Molecular Structure,
J. Chromatogr. A, 1994, 662, 2, 269-280, https://doi.org/10.1016/0021-9673(94)80515-6
. [all data]
Engewald, Maurer, et al., 1989
Engewald, W.; Maurer, T.; Schiefke, A.,
Investigation of isomeric hydrocarbons by gas-solid chromatography on graphitized thermal carbon black,
Pure Appl. Chem., 1989, 61, 11, 2001-2004, https://doi.org/10.1351/pac198961112001
. [all data]
Laub and Purnell, 1988
Laub, R.J.; Purnell, J.H.,
Specific retention volumes, retention indices, and family-plot regressions of aliphatic, alicyclic, and aromatic hydrocarbon solutes with OV-101 poly (dimethylsiloxane) stationary phase,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1988, 11, 9, 649-660, https://doi.org/10.1002/jhrc.1240110908
. [all data]
Lunskii and Paizanskaya, 1988
Lunskii, M.Kh.; Paizanskaya, I.L.,
Identification of hydrocarbons C1-C9 of petrol fractions of oils and condensates in the use of capillary columns with dinonylphthalate,
Zh. Anal. Khim., 1988, 43, 127-135. [all data]
Boneva and Dimov, 1986
Boneva, S.; Dimov, N.,
Unified retention index of hydrocarbons separated on dimethylsilicone OV-101,
Chromatographia, 1986, 21, 12, 697-700, https://doi.org/10.1007/BF02313682
. [all data]
Chien, Furio, et al., 1983
Chien, C.-F.; Furio, D.L.; Kopecni, M.M.; Laub, R.J.,
Specific Retention Volumes and Retention Indices of Selected Hydrocarbon Solutes with OV-101 and SP-2100 Polydimethylsiloxane Solvents,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1983, 6, 10, 577-580, https://doi.org/10.1002/jhrc.1240061013
. [all data]
Lubeck and Sutton, 1983
Lubeck, A.J.; Sutton, DL.,
Kovats retention indices of selected hydrocarbons through C10 on bonded phase fused silica capillaries,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1983, 6, 6, 328-332, https://doi.org/10.1002/jhrc.1240060612
. [all data]
Johansen and Ettre, 1982
Johansen, N.G.; Ettre, L.S.,
Retention index values of hydrocarbons on open-tubular columns coated with methylsilicone liquid phases,
Chromatographia, 1982, 15, 10, 625-630, https://doi.org/10.1007/BF02279488
. [all data]
Nijs and Jacobs, 1981
Nijs, H.H.; Jacobs, P.A.,
On-Line Single Run Analysis of Effluents from a Fischer-Tropsch Reactor,
J. Chromatogr. Sci., 1981, 19, 1, 40-45, https://doi.org/10.1093/chromsci/19.1.40
. [all data]
Castello and D'Amato, 1979
Castello, G.; D'Amato, G.,
Use of Linear and Branched-Chain Paraffinic Liquid Phases as Non-Polar Reference Materials in Gas Chromatography,
J. Chromatogr., 1979, 175, 1, 27-35, https://doi.org/10.1016/S0021-9673(00)86400-6
. [all data]
Nabivach and Kirilenko, 1979
Nabivach, V.M.; Kirilenko, A.V.,
The use of retention indices for identifying the components of crude benzene,
Solid Fuel Chem. (Engl. Transl.), 1979, 13, 3, 82-87. [all data]
Chretien and Dubois, 1976
Chretien, J.R.; Dubois, J.-E.,
New Perspectives in the Prediction of Kovats Indices,
J. Chromatogr., 1976, 126, 171-189, https://doi.org/10.1016/S0021-9673(01)84071-1
. [all data]
Lulova, Leont'eva, et al., 1976
Lulova, N.I.; Leont'eva, S.A.; Timofeeva, A.N.,
Gas-chromatographic method of determination of individual hydrocarbons in catalytic cracking gasolines
in Proceedings of All-Union Research Institute on Oil Processes. Vol.18, All-Union Research Institute on Oil Processes, Moscow, 1976, 30-53. [all data]
Rijks and Cramers, 1974
Rijks, J.A.; Cramers, C.A.,
High precision capillary gas chromatography of hydrocarbons,
Chromatographia, 1974, 7, 3, 99-106, https://doi.org/10.1007/BF02269819
. [all data]
Rappoport and Gäumann, 1973
Rappoport, S.; Gäumann, T.,
114. L'indice de rétention des alcanes isomères en chromatographie en phase gazeuse,
Helv. Chim. Acta, 1973, 56, 3, 1145-1158, https://doi.org/10.1002/hlca.19730560338
. [all data]
Schomburg and Dielmann, 1973
Schomburg, G.; Dielmann, G.,
Identification by means of retention parameters,
J. Chromatogr. Sci., 1973, 11, 3, 151-159, https://doi.org/10.1093/chromsci/11.3.151
. [all data]
Sidorov, Petrova, et al., 1972
Sidorov, R.I.; Petrova, V.I.; Ivanova, M.P.,
Qualitative analysis of wide-boiling fraction C5-C10 with capillary chromatography
in Processes in chromatographic columns. Vol.17, 1972, 14-25. [all data]
Dimov and Schopov, 1971
Dimov, N.; Schopov, D.,
Empirische korrektion der physikalisch-chemischen retentionsindexe von kohlenwasserstoffen auf squalan,
J. Chromatogr., 1971, 63, 223-228, https://doi.org/10.1016/S0021-9673(01)85634-X
. [all data]
Robinson and Odell, 1971
Robinson, P.G.; Odell, A.L.,
A system of standard retention indices and its uses. The characterisation of stationary phases and the prediction of retention indices,
J. Chromatogr., 1971, 57, 1-10, https://doi.org/10.1016/0021-9673(71)80001-8
. [all data]
Takács, Szita, et al., 1971
Takács, J.; Szita, C.; Tarján, G.,
Contribution to the theory of the retention index system. III. Retention index and molecular structure. Calculation of retention indices of paraffin hydrocarbons on the basis of their molecular structure,
J. Chromatogr., 1971, 56, 1-12, https://doi.org/10.1016/S0021-9673(00)97771-9
. [all data]
Mitra and Saha, 1970
Mitra, G.D.; Saha, N.C.,
Determination of Retention Indices of Saturated Hydrocarbons by Graphical Methods,
J. Chromatogr. Sci., 1970, 8, 2, 95-102, https://doi.org/10.1093/chromsci/8.2.95
. [all data]
Matukuma, 1969
Matukuma, A.,
Retention indices of alkanes through C10 and alkenes through C8 and relation between boiling points and retention data,
Gas Chromatogr., Int. Symp. Anal. Instrum. Div Instrum Soc. Amer., 1969, 7, 55-75. [all data]
Hively and Hinton, 1968
Hively, R.A.; Hinton, R.E.,
Variation of the retention index with temperature on squalane substrates,
J. Gas Chromatogr., 1968, 6, 4, 203-217, https://doi.org/10.1093/chromsci/6.4.203
. [all data]
Tourres, 1967
Tourres, D.A.,
Structural analysis of industrial butene dimers by gas chromatography,
J. Gas Chromatogr., 1967, 5, 1, 35-40, https://doi.org/10.1093/chromsci/5.1.35
. [all data]
Tourres, 1967, 2
Tourres, D.A.,
Structure moléculaire et rétention en chromatographie en phase gazeuse. Influence de la température sur l'indice de rétention d'alcanes isomères,
J. Chromatogr., 1967, 30, 357-377, https://doi.org/10.1016/S0021-9673(00)84168-0
. [all data]
Widmer, 1967
Widmer, H.,
Gas chromatographic identification of hydrocarbons using retention indices,
J. Gas Chromatogr., 1967, 5, 10, 506-510, https://doi.org/10.1093/chromsci/5.10.506
. [all data]
Evans, 1966
Evans, M.B.,
Retention indices of solutes on squalane, dinonyl phthalate, and polyethylene glycol 400,
J. Gas Chromatogr., 1966, 4, 1, 1-3, https://doi.org/10.1093/chromsci/4.1.1
. [all data]
Rembold, Wallner, et al., 1989
Rembold, H.; Wallner, P.; Nitz, S.; Kollmannsberger, H.; Drawert, F.,
Volatile components of chickpea (Cicer arietinum L.) seed,
J. Agric. Food Chem., 1989, 37, 3, 659-662, https://doi.org/10.1021/jf00087a018
. [all data]
Hayes and Pitzer, 1982
Hayes, P.C., Jr.; Pitzer, E.W.,
Characterizing petroleum- and shale-derived jet fuel distillates via temperature-programmed Kováts indices,
J. Chromatogr., 1982, 253, 179-198, https://doi.org/10.1016/S0021-9673(01)88376-X
. [all data]
Louis, 1971
Louis, R.,
Kovats-index-tafeln zur gaschromatographischen analyse von kohlenwasserstoffgemischen,
Erdoel Kohle Erdgas Petrochem., 1971, 24, 2, 88-94. [all data]
Haagen-Smit Laboratory, 1997
Haagen-Smit Laboratory,
Procedure for the detailed hydrocarbon analysis of gasolines by single column high efficiency (capillary) column gas chromatography, SOP NO. MLD 118, Revision No. 1.1, California Environmental Protection Agency, Air Resources Board, El Monte, California, 1997, 22. [all data]
Hoekman, 1993
Hoekman, S.K.,
Improved gas chromatography procedure for speciated hydrocarbon measurements of vehicle emissions,
J. Chromatogr., 1993, 639, 2, 239-253, https://doi.org/10.1016/0021-9673(93)80260-F
. [all data]
Censullo, Jones, et al., 2003
Censullo, A.C.; Jones, D.R.; Wills, M.T.,
Speciation of the volatile organic compounds (VOCs) in solventborne aerosol coatings by solid phase microextraction-gas chromatography,
J. Coat. Technol., 2003, 75, 936, 47-53, https://doi.org/10.1007/BF02697922
. [all data]
LECO Corporation, 2003
LECO Corporation,
Determination of hydrocarbon components in petroleum naphthas, 2003, retrieved from http://www.leco.org/customersupport/apps/separationscience/-190.pdf. [all data]
Sun and Stremple, 2003
Sun, G.; Stremple, P.,
Retention index characterization of flavor, fragrance, and many other compounds on DB-1 and DB-XLB, 2003, retrieved from http://www.chem.agilent.com/cag/cabu/pdf/b-0279.pdf. [all data]
Xu, van Stee, et al., 2003
Xu, X.; van Stee, L.L.P.; Williams, J.; Beens, J.; Adahchour, M.; Vreuls, R.J.J.; Brinkman, U.A.Th.; Lelieveld, J.,
Comprehensive two-dimensional gas chromatography (GC×GC) measurements of volatile organic compounds in the atmosphere,
Atmos. Chem. Phys., 2003, 3, 3, 665-682, https://doi.org/10.5194/acp-3-665-2003
. [all data]
Yin, Liu, et al., 2001
Yin, C.; Liu, W.; Li, Z.; Pan, Z.; Lin, T.; Zhang, M.,
Chemometrics to chemical modeling: structural coding in hydrocarbons and retention indices of gas chromatography,
J. Sep. Sci., 2001, 24, 3, 213-220, https://doi.org/10.1002/1615-9314(20010301)24:3<213::AID-JSSC213>3.0.CO;2-4
. [all data]
Martos, Saraullo, et al., 1997
Martos, P.A.; Saraullo, A.; Pawliszyn, J.,
Estimation of air/coating distribution coefficients for solid phase microextraction using retention indexes from linear temperature-programmed capillary gas chromatography. Application to the sampling and analysis of total petroleum hydrocarbons in air,
Anal. Chem., 1997, 69, 3, 402-408, https://doi.org/10.1021/ac960633p
. [all data]
Subramaniam, Bochniak, et al., 1994
Subramaniam, B.; Bochniak, D.; Snavely, K.,
Fischer-Tropsch synthesis in supercritical reaction media, Lawrence Department of Chemical and Petroleum Engineering (DOE/PC/92532--T7), United States Department of Energy, Pittsburgh, PA, 1994, 8, retrieved from http://www.NTIS.gov. [all data]
Olson, Sinkevitch, et al., 1992
Olson, K.L.; Sinkevitch, R.M.; Sloane, T.M.,
Speciation and Quantitation of Hydrocarbons in Gasoline Engine Exhaust,
J. Chromatogr. Sci., 1992, 30, 12, 500-508, https://doi.org/10.1093/chromsci/30.12.500
. [all data]
White, Douglas, et al., 1992
White, C.M.; Douglas, L.J.; Hackett, J.P.; Anderson, R.R.,
Characterization of synthetic gasoline from the chloromethane-zeolite reaction,
Energy Fuels, 1992, 6, 1, 76-82, https://doi.org/10.1021/ef00031a012
. [all data]
White, Hackett, et al., 1992
White, C.M.; Hackett, J.; Anderson, R.R.; Kail, S.; Spock, P.S.,
Linear temperature programmed retention indices of gasoline range hydrocarbons and chlorinated hydrocarbons on cross-linked polydimethylsiloxane,
J. Hi. Res. Chromatogr., 1992, 15, 2, 105-120, https://doi.org/10.1002/jhrc.1240150211
. [all data]
Bangjie, Xijian, et al., 1987
Bangjie, C.; Xijian, G.; Shaoyi, P.,
Calculation of retention indices in temperature-programmed gas chromatography,
Chromatographia, 1987, 23, 12, 888-892, https://doi.org/10.1007/BF02261466
. [all data]
Haynes and Pitzer, 1985
Haynes, P.C., Jr.; Pitzer, E.W.,
Disengaging solutes in shale- and petroleum-derived jet fuels by altering GC programmed temperature rates,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1985, 8, 5, 230-242, https://doi.org/10.1002/jhrc.1240080504
. [all data]
Hayes and Pitzer, 1981
Hayes, P.C., Jr.; Pitzer, E.W.,
Kovats indices as a tool in characterizing hydrocarbon fuels in temperature programmed glass capillary gas chromatography. Part 1. Qualitative identification, Inhouse rpt. for Air Force Wright Aeronautical Labs., Air Force Wright Aeronautical Labs., Wright-Patterson AFB, Ohio, 1981, 75. [all data]
Hassoun, Pilling, et al., 1999
Hassoun, S.; Pilling, M.J.; Bartle, K.D.,
A catalogue of urban hydrocarbons for the city of Leeds: atmospheric monitoring of volatile organic compounds by thermal desorption-gas chromatography,
J. Environ. Monitor., 1999, 1, 5, 453-458, https://doi.org/10.1039/a904879k
. [all data]
Wu and Lu, 1984
Wu, J.; Lu, W.,
Hydrocarbon analysis by open-tubular column chromatography with programmed temperature for straight run gasoline,
Anal. Chem., 1984, 12, 7, 572-578. [all data]
Wu and Lu, 1984, 2
Wu, J.; Lu, W.,
Kovats indices of C4-C10 hydrocarbons in apolar quartz capillary OV-101,
Chin. J. Chromatogr., 1984, 1, 1, 11-17. [all data]
Dimov N., 1976
Dimov N.,
Quantitative gas chromatographic analysis and determination of solute properties. An exact equation for the calculation of the retention indices of isoalkanes on Squalane,
J. Chromatogr., 1976, 119, 109-118, https://doi.org/10.1016/S0021-9673(00)86775-8
. [all data]
Vigdergauz and Martynov, 1971
Vigdergauz, M.S.; Martynov, A.A.,
Some applications of the gas chromatographic linear retention indices,
Chromatographia, 1971, 4, 10, 463-467, https://doi.org/10.1007/BF02268816
. [all data]
Bramston-Cook, 2013
Bramston-Cook, R.,
Kovats indices for C2-C13 hydrocarbons and selected oxygenated/halocarbons with 100 % dimethylpolysiloxane columns, 2013, retrieved from http://lotusinstruments.com/monographs/List .... [all data]
Supelco, 2012
Supelco, CatalogNo. 24160-U,
Petrocol DH Columns. Catalog No. 24160-U, 2012, retrieved from http://www.sigmaaldrich.com/etc/medialib/docs/Supelco/Datasheet/1/w97949.Par.0001.File.tmp/w97949.pdf. [all data]
Zhang, Ding, et al., 2009
Zhang, X.; Ding, L.; Sun, Z.; Song, L.; Sun, T.,
Study on quantitative structure-retention relationships for hydrocarbons in FCC gasoline,
Chromatographia, 2009, 70, 3/4, 511-518, https://doi.org/10.1365/s10337-009-1174-0
. [all data]
Krkosova, Kubinec, et al., 2007
Krkosova, Z.; Kubinec, R.; Addova, G.; Jurdakova, H.; Blasko, J.; Ostrovsky, I.; Sojak, L.,
Gas chromatographic - mass spectrometric characterization of monomethylalkanes from fuel diesel,
Petroleum Coal, 2007, 49, 3, 51-62. [all data]
Sojak, Kubinec, et al., 2006
Sojak, L.; Kubinec, R.; Jurdakova, H.; Hajekova, E.; Bajus, M.,
GC-MS of polyethylene and polypropylene thermal cracking produxts,
Petroleum Coal, 2006, 48, 1, 1-14. [all data]
Guan, Li, et al., 1995
Guan, Y.; Li, L.; Zhou, L.,
Live retention database for compound identification in capillary gas chromatography,
Chin. J. Chromatogr., 1995, 13, 5, 851-857. [all data]
Ciccioli, Cecinato, et al., 1992
Ciccioli, P.; Cecinato, A.; Brancaleoni, E.; Frattoni, M.; Liberti, A.,
Use of carbon adsorption traps combined with high resolution gas chromatography - mass spectrometry for the analysis of polar and non-polar C4-C14 hydrocarbons involved in photochemical smog formation,
J. Hi. Res. Chromatogr., 1992, 15, 2, 75-84, https://doi.org/10.1002/jhrc.1240150205
. [all data]
Berdague, Denoyer, et al., 1991
Berdague, J.-L.; Denoyer, C.; Le Quéré, J.-L.; Semon, E.,
Volatile components of dry-cured ham,
J. Agric. Food Chem., 1991, 39, 7, 1257-1261, https://doi.org/10.1021/jf00007a012
. [all data]
Dahlmann, Köser, et al., 1979
Dahlmann, G.; Köser, H.J.K.; Oelert, H.H.,
Multiple korrelation von retentionsindizes,
Chromatographia, 1979, 12, 10, 665-671, https://doi.org/10.1007/BF02302943
. [all data]
Chen and Feng, 2007
Chen, Y.; Feng, C.,
QSPR study on gas chromatography retention index of some organic pollutants,
Comput. Appl. Chem. (China), 2007, 24, 10, 1404-1408. [all data]
Feng and Mu, 2007
Feng, H.; Mu, L.-L.,
Quantitative structure-retention relationships for alkane and its derivatives based on electrotopological state index and molecular shape index,
Chem. Ind. Engineering (Chinese), 2007, 24, 2, 161-168. [all data]
Blunden, Aneja, et al., 2005
Blunden, J.; Aneja, V.P.; Lonneman, W.A.,
Characterization of non-methane volatile organic compounds at swine facilities in eastern North Carolina,
Atm. Environ., 2005, 39, 36, 6707-6718, https://doi.org/10.1016/j.atmosenv.2005.03.053
. [all data]
Du and Liang, 2003
Du, Y.; Liang, Y.,
Data mining for seeking accurate quantitative relationship between molecular structure and GC retention indices of alkanes by projection pursuit,
Comput. Biol. Chem., 2003, 27, 3, 339-353, https://doi.org/10.1016/S1476-9271(02)00081-6
. [all data]
Junkes, Castanho, et al., 2003
Junkes, B.S.; Castanho, R.D.M.; Amboni, C.; Yunes, R.A.; Heinzen, V.E.F.,
Semiempirical Topological Index: A Novel Molecular Descriptor for Quantitative Structure-Retention Relationship Studies,
Internet Electronic Journal of Molecular Design, 2003, 2, 1, 33-49. [all data]
Yin, Guo, et al., 2001
Yin, C.; Guo, W.; Lin, T.; Liu, S.; Fu, R.; Pan, Z.; Wang, L.,
Application of wavelet neural network to the prediction of gas chromatographic retention indices of alkanes,
J. Chinese Chem. Soc., 2001, 48, 739-749. [all data]
Spieksma, 1999
Spieksma, W.,
Determination of vapor liquid equilibrium from the Kovats retention index on dimethylsilicone using the Wilson mixing tool,
J. Hi. Res. Chromatogr., 1999, 22, 10, 565-588, https://doi.org/10.1002/(SICI)1521-4168(19991001)22:10<565::AID-JHRC565>3.0.CO;2-2
. [all data]
Zhu and He, 1999
Zhu, X.; He, L.,
Derivation of isothermal retention indices from a retention values under multiple-ramp temperature-programmed conditions,
J. Instrum. Anal. (Chinese), 1999, 18, 6, 10-12. [all data]
Xu, Chu, et al., 1995
Xu, X.; Chu, S.; Song, N.,
Application of chromatographic studies of air pollution in China,
J. Chromatogr. A, 1995, 710, 1, 21-37, https://doi.org/10.1016/0021-9673(95)00173-K
. [all data]
Ciccioli, Cecinato, et al., 1994
Ciccioli, P.; Cecinato, A.; Brancaleoni, E.; Brachetti, A.; Frattoni, M.; Sparapani, R.,
Composition and Distribution of Polar and Non-Polar VOCs in Urban, Rural, Forest and Remote Areas,
Eur Commission EUR, 1994, 549-568. [all data]
Skrbic and Cvejanov, 1993
Skrbic, B.D.; Cvejanov, J.Dj.,
Correlation of unified retention indices for OV-101 and squalane,
Chromatographia, 1993, 35, 1/2, 109-110, https://doi.org/10.1007/BF02278566
. [all data]
Petrov, 1984
Petrov, A.A.,
Hydrocarbons of petroleum, Nauka (publishing house), Moscow, 1984, 263. [all data]
Kojima, Fujii, et al., 1980
Kojima, T.; Fujii, T.; Hosaka, Y.,
Thermal decomposition products of sterepisomeric polypropylenes,
Mass Spectrometry, 1980, 28, 4, 335-341. [all data]
Robinson and Odell, 1971, 2
Robinson, P.G.; Odell, A.L.,
Comparison of isothermal and non-linear temperature programmed gas chromatography. The temperature dependence of the retention indices of a number of hydrocarbons on squalane and SE-30,
J. Chromatogr., 1971, 57, 11-17, https://doi.org/10.1016/0021-9673(71)80002-X
. [all data]
Kim. J.H., Ahn, et al., 2004
Kim. J.H.; Ahn, H.J.; Yook, H.S.; Kim, K.S.; Rhee, M.S.; Ryu, G.H.; Byun, M.W.,
Color, flavor, and sensory characteristics of gamma-irradiated salted and fermented anchovy sauce,
Radiation Phys. Chem., 2004, 69, 2, 179-187, https://doi.org/10.1016/S0969-806X(03)00400-6
. [all data]
Notes
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