Gas Chromatographic Retention Data

This release includes retention data and related information abstracted from journal articles, technical reports and internet sources that were published over the period 1958-2003.

The following types of retention indices are represented:

where tn and tn+1 are retention times of the reference n-alkane hydrocarbons eluting immediately before and after chemical compound “X”; tx is the retention time of compound “X”. Lee retention indices are determined by analogy with Kovats indices for the following reference compounds: benzene, naphthalene, phenanthrene, chrysene and picene.

Retention information is presented in the following fields:

  1. Chemical compounds are represented by
  2. Retention data value.
  3. Dimensions of retention data (may be Kovats index, Lee index, isothermal and non-isothermal data)
  4. Column specification (when available):
  5. Description of temperature conditions:
  6. Literature source: includes full bibliographic citation

The present release contains gas-chromatographic information only for non-polar and slightly polar stationary phases:

  1. 100% methyl silicone (DB-1, OV-101, SE-30, CP-Sil 5CB, HP-1 etc).
  2. 5% diphenyl, 95% methylpolysiloxane stationary phase (DB-5, HP-5, Ultra-2, RTX-5, CP Sil 8 CB)
  3. Squalane, Apiezones, Apolane

A list of stationary phases in the database can be found here.


  1. Kovats, E., Helv. Chim. Acta, 1958, 41, 1915.
  2. Van Den Dool, H., Kratz, P.D., J. Chromatography, 1963, 11, 463-471.
  3. Lee, M.L., Vassilaros, D.L., White, C.M., Novotny, M., Anal. Chem., 1979, 51(6), 768-773.

NIST, National Institute of Standards and Technology Material Measurement Laboratory Standard Reference
Data Program