[Use of solid phase extraction for rapid sample preparation in the determination of food constituents. I. Quinine in beverages]. / Anwendung der Festphasenextraktion zur raschen Probenvorbereitung bei der Bestimmung von Lebensmittelinhaltsstoffen. I. Chinin in Getränken.

A routine method was developed for the determination of quinine in spirits and alcohol-free beverages. Using ion pair chromatography quinine was separated from interfering substances by high-performance liquid chromatography on a RP 18 phase and analysed by UV and fluorescence detection. In contrast to the analysis of alcohol-free beverages, sample preparation was necessary in the study of alcoholic beverages. Solid-phase extraction on phenyl sorbens was found to be a rapid, specific and simple technique.