General Test Mixes

These test mixes can be used following installation or on a routine schedule to indicate column efficiency, leaks, dead volume, and column inertness.

Programmed Test Mix

This test mix is based on the comprehensive mix developed by Grob. (1) It can be used to measure a column′s affinity for many analyte types:
  • The normal alkanes (decane and undecane) measure column efficiency.
  • The fatty acid methyl esters (methyl decanoate, methyl laurate, and methyl undecanoate) measure column efficiency.
  • The alcohol (1-octanol) and diol (2,3-butanediol) measure the presence of hydrogen-bonding sites (exposed silanols).
  • The aldehyde (nonanal) measures saturated aldehyde adsorption by means other than hydrogen-bonding.
  • The amine (dicyclohexylamine) measures irreversible adsorption.
  • The acid/base pair (2,6-dimethylphenol/2,6-dimethylaniline) measure acid/base surface characteristic.
  • The acid/base pair (2-ethylhexanoic acid/dicyclohexylamine) measure acid/base surface characteristic.

1. Grob, et al., J. Chromatogr. 156 (1978) p. 1.

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47304 Programmed Test Mix certified reference material, in dichloromethane (varied conc.)

Isothermal Test Mixes

Use these test mixes for isothermal analysis. Match the polarity of the test mix with the polarity of the column. A convenient kit containing one of each mix is available.

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47301 Intermediate Polar Column Test Mix certified reference material, 500 μg/mL in dichloromethane
47303 Isothermal Test Mix Kit analytical standard
47300-U Nonpolar Column Test Mix certified reference material, 500 μg/mL in dichloromethane
47302 Polar Column Test Mix certified reference material, 500 μg/mL each component in dichloromethane

Hydrocarbon Test Mix

Use this test mix to check for proper capillary GC column installation. Calculating theoretical plates is also possible.

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40147-U C8-C40 Alkanes Calibration Standard in dichloromethane (varied)
48244 Hydrocarbon Test Mix certified reference material, in chloroform (varied conc.)

Acidity Test Mix

Use this test mix to measure the acid/base affinity of your column. Simply inject this mix and compare peak heights.

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48255-U Acidity Test Mix 0.05% each component in methylene chloride, analytical standard