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Thermostable glass open tubular capillary columns with a polar liquid phase for gas chromatography

✍ Scribed by Shen-Nan Lin; C.D. Pfaffenberger; E.C. Horning

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
572 KB
Volume
104
Category
Article
ISSN
1873-3778

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✦ Synopsis

A two-stage process involving a thermo-evaporative technique was employed to coat glass capillary columns with polar phases. Silanox 101 and a small amount of liquid phas: were introduced in the first stage: additional phase was introduced in the second stage. The theoretical plate efficiency for See-cholestane at 250" For a 32 m x 0.25 mm glass column coated with liquid phase PZ-176 was 1800/m. Column properties remained constant when these columns were used between 180" and 320" for the analysis of biologic samples. No indication of deterioration was observed after months of use. Columns made with phase PZ-I 76 are useful For the separation of long-chain fatty acid methyl esters. polychlorobiphenyls and a-tocopherol as the trimethylsilyl derivative.

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