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Determination of bi phenyl and 8 bi phenols in microbial extracts by gas chromatography and thin layer chromatography


, : Determination of bi phenyl and 8 bi phenols in microbial extracts by gas chromatography and thin layer chromatography. Analytical Chemistry 50(6): 736-740

Thin-layer and gas chromatographic methods have been developed for the determination of the carcinogen biphenyl and 8 of its mono- or dihydroxylated phenolic analogues in microbiological media and homogenates of the fungus, Cunninghamella elegans. Biphenyl is analyzed by gas chromatography following n-heptane extraction of alkalinized systems. The biphenols are extracted at pH 6 with ethyl acetate and chromatographed as their heptafluorobutyrate derivatives. Using naphthalene and 1-naphthol as internal standards for biphenyl and the biphenols, respectively, recoveries of 88% or better were achieved with all but two of the compounds analyzed while SD were less than 5%. Six TLC systems were developed for separation and detection of the biphenyl compounds in microbial extracts. Chromogenic spray reagents are described which assist in distinguishing between biphenols with similar chromatographic mobilities.

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