期刊
JOURNAL OF CHROMATOGRAPHY A
卷 871, 期 1-2, 页码 23-30出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0021-9673(99)00993-0
关键词
food analysis; beverages; tetrahydrocarboline; tetrahydrocarbolinecarboxylic acids; carbolines; organic acids
The presence and analysis of two tetrahydro-beta-carboline-3-carboxylic acids in foods are studied. Sample preparation with benzenesulfonic acid strong cation-exchange columns followed by RP-HPLC-fluorescence allowed a reliable analysis and spectral characterization of 1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid (THCA) and 1-methyl-1,2,3,4-tetrahydro-beta-carboline-3-carboxylic acid (MTCA). Experimental data showed that upon oxidation tetrahydro-beta-carboline-3-carboxylic acids gave rise to beta-carbolines (norharman and harman) that were also chromatographically separated and their fluorescent profile monitored. This approach was useful to confirm identification of tetrahydro-beta-carboline-3-carboxylic acids in foods. Several foods and beverages contained THCA and MTCA in varying proportions. Their occurrence in foods implies that diet is a source of these compounds in humans. (C) 2000 Elsevier Science B.V. All rights reserved.
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