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RAS Chemistry & Material ScienceЖурнал аналитической химии Journal of Analytical Chemistry

  • ISSN (Print) 0044-4502
  • ISSN (Online) 3034-512X

GAS CHROMATOGRAPHIC DETERMINATION OF ETHANOL IN SOFT DRINKS USING VAPOR-PHASE DROP MICROEXTRACTION

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PII
S0044450225080043-1
DOI
10.31857/S0044450225080043
Publication type
Article
Status
Published
Authors
O. V. Rodinkov
  • Affiliation: Saint Petersburg State University, Institute of Chemistry
Volume/ Edition
Volume 80 / Issue number 8
Pages
809-816
Abstract
A simple express procedure for gas chromatographic determination of ethanol in soft drinks is proposed (kwas, grape juice, non-alcoholic beer), based on headspace microextraction of the analyte into a drop (1 μL) of distilled water located above the surface of the analyzed liquid on the tip of the needle of a standard microsyringe for gas chromatography. The detection limit of ethanol is (3–6) × 10 vol. %, the parallel determination time, including headspace extraction, does not exceed 5 min. Propanol-2, which is not detected in beverages, is used as an internal standard. The correctness of the procedure is confirmed by the added–found method, the relative standard deviation does not exceed 7 % at an ethanol concentration in the sample of 10 vol. %.
Keywords
паробразная капельная микроэкстракция безалкогольные напитки этанол определение газовая хроматография
Date of publication
14.09.2025
Year of publication
2025
Number of purchasers
0
Views
14

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