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QUANTITATIVE EVALUATION OF HEADSPACE DETERMINATION OF DIMETHYL SULPHIDE IN MALT
Author(s) -
DROZD J.,
HAVLOVÁ P.,
NOVÁK V.
Publication year - 1990
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.2050-0416.1990.tb01016.x
Subject(s) - analyte , chromatography , chemistry , relative standard deviation , extraction (chemistry) , quantitative analysis (chemistry) , solvent , suspension (topology) , gas chromatography , standard solution , analytical chemistry (journal) , detection limit , organic chemistry , mathematics , homotopy , pure mathematics
A novel procedure for the determination of dimethyl sulphide (DMS) in malt is described. Finely ground malt is suspended in a suitable solvent (ethanol‐water) and the suspension as a whole is subjected to gas chromatographic headspace analysis without any further treatment. The conception of the quantitative evaluation in this analysis of volatile analyte in a multiphase system by a standard addition technique is presented and confirmed. In comparison with a commonly employed procedure involving an extraction step, centrifugation etc., the results are, on average, three times higher. It is suggested that the proposed method minimizes possible losses of the volatile analyte and is more reliable and simple. Relative standard deviation of the results was 12% at the μg/g concentration level.