Enantiomeric analysis of amino acids by using comprehensive two-dimensional gas chromatography

Melanie Junge, Helmut Huegel, Philip Marriott

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23 Citations (Scopus)

Abstract

The chiral separation of amino acids (AA) derivatised with ethyl chloroformate by using comprehensive two-dimensional gas chromatography is reported. A commercially available enantioselective capillary column (Chirasil-L-Val) has been tested as first-dimension column. Two nonenantioselective stationary phases (BPX50 and BP1) with different column lengths were combined with the enantioselective column, which represent chiral/polar and chiral/low-polarity column sets, respectively. These column sets were evaluated to determine the most useful column combination to provide improved separation efficiency of enantioselective AA analysis. Separations of AA mixtures derivatised either as their N-trifluoroacetyl methyl esters or with methyl chloroformate, performed on a chiral/low-polarity column set, are also shown. The method was demonstrated for chiral analysis of AAs in different beer samples. The major AA in the beer samples was proline with amounts ranging from around 65-95 with minor contents of glycine and the L-enantiomers of alanine, valine, leucine, and isoleucine. Small amounts of D-alanine, at about 1, 1.5, and 15 were detected in the three samples.
Original languageEnglish
Pages (from-to)228 - 234
Number of pages7
JournalChirality
Volume19
Issue number3
DOIs
Publication statusPublished - 2007
Externally publishedYes

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