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VARIATIONS OF RELATIVE RETENTION TIMES IN OPEN‐TUBULAR GAS‐CHROMATOGRAPHIC COLUMNS: RELEVANCY TO FRUIT VOLATILES
Author(s) -
SCHULTZ T. H.,
MON T. R.,
FORREY R. R.
Publication year - 1970
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1970.tb12129.x
Subject(s) - chromatography , retention time , adsorption , silicone oil , chemistry , silicone , kovats retention index , coating , analytical chemistry (journal) , gas chromatography , organic chemistry
SUMMARY: Open‐tubular gas chromatographic columns made from stainless steel tubing, coated with methyl silicone oil, give variable retention times for individual alcohols, dependent on the size of sample. This difficulty is largely overcome by using a small proportion of adsorption‐reducing material with the methyl silicone. There are cases of reversal of peak order, caused by differences in column temperature or minor differences in the coating. However, with care, relative retention times are nearly constant and are helpful as an aid in identification of compounds. A procedure for precise comparison of the retention times of unknown fruit volatiles with known compounds is described. Relative retention times of representative compounds are given for twelve different stationary liquids.