Abstract
Several techniques for the formation and separation of volatile derivatives of amino acids were tested. The use of methyl esters of the N-trifluoroacetyl derivatives was investigated more fully, and some modifications to published techniques were made. A statistical comparison between the results and those obtained some years ago using liquid chromatography showed that for twelve of the amino acids gas chromatography was not inferior to manually-operated liquid chromatography, but that automatic analysers had given better replication.
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