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Quantitative determination of glycerin in soap by capillary gas chromatography
Author(s) -
Molever Keith
Publication year - 1987
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540797
Subject(s) - derivatization , chromatography , bstfa , chemistry , silylation , gas chromatography , flame ionization detector , capillary action , capillary electrophoresis , standard addition , sample preparation , dimethylformamide , detection limit , high performance liquid chromatography , organic chemistry , solvent , materials science , composite material , catalysis
A simple and rapid procedure is described for the isolation, silylation and capillary gas chromatographic quantitation of the free glycerin content in soap. Free glycerin is determined by mixing the sample with dimethylformamide (DMF), filtering the mixture, silylating an aliquot with bis ‐trimethylsilyltrifluoroacetamide (BSTFA), and quantitating by capillary GC using flame ionization detection. Silyl derivatization and capillary gas chromatography provide for a quick and easy analysis which allows straightforward automated gas chromatographic analysis instead of the more tedious traditional periodate methods. This procedure also provides reliable quantitation for glycerin levels in soap lower than those measurable with the standard methods.