Detection of trace amounts of methylated uric acids in crude caffeine from different sources
In TLC analyses of crude caffeine from ripe Coffea excelsa beans the authors found traces of highly methylated uric acids. In order to quantify and identify these compounds they have chromatographed larger samples on a cation exchange column. By this method it is possible to separate a few micrograms of methyluric acids from about 20 mg caffeine. So far they have examined caffeine preparations from tea leaves and from coffee beans of different species for their content of such accompanying substances
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| Main Authors: | , , , , , |
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| Format: | biblioteca |
| Published: |
Paris (Francia)
1979
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| Subjects: | COFFEA EXCELSA, BIOQUIMICA, ANALISIS QUIMICO, CAFEINA, ACIDOS, ACIDO URICO, |
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