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A SEMI‐AUTOMATIC METHOD FOR THE GAS CHROMATOGRAPHIC DETERMINATION OF VICINAL DIKETONES IN ALCOHOLIC BEVERAGES
Author(s) -
Leppänen O.,
Ronkainen P.,
Koivisto T.,
Denslow J.
Publication year - 1979
Publication title -
journal of the institute of brewing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 51
eISSN - 2050-0416
pISSN - 0046-9750
DOI - 10.1002/j.2050-0416.1979.tb03923.x
Subject(s) - diacetyl , chromatography , gas chromatography , chemistry , vicinal , dilution , reproducibility , electron capture detector , isotope dilution , sample (material) , sample preparation , coefficient of variation , analytical chemistry (journal) , mass spectrometry , organic chemistry , physics , thermodynamics
A method has been developed for the routine determination of diacetyl and pentanedione in alcoholic beverages. After the addition of internal standard and any necessary dilution, a stream of nitrogen swept the components of the sample at a fixed temperature to a 2 ml injection loop of a gas chromatograph fitted with an electron capture detector. The data from the chromatograph were collected on cassette and processed by computer. The time between starting temperature equilibration of the sample and obtaining the diketone content as μg/litre beverage was about 17 min. The coefficient of variation for diacetyl was 1·8% (5·1%, with manual injections) and for 2,3 pentanedione 1·6% (9·1%) for replicated analyses of the same sample.