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2.
Z Lebensm Unters Forsch ; 158(5): 295-9, 1975 Aug 28.
Article in German | MEDLINE | ID: mdl-179249

ABSTRACT

The recently proposed spectroscopical determination of coffeine in soft drinks after filtration of polyamide leads to higher coffeine values than originally present, due to substances absorbed by the UV light. Therefore a method is proposed for identification and quantitative determination of coffeine in soft drinks and in methanol extracts of coffeine-containing foods by column chromatography on silical gel.


Subject(s)
Beverages/analysis , Caffeine/analysis , Chromatography, Gel , Filtration , Germany, West , Silicon Dioxide , Spectrophotometry, Ultraviolet
10.
Med Biol Illus ; 17(2): 100-7, 1967 Apr.
Article in English | MEDLINE | ID: mdl-6041468
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