Abstract
Development of a quality control material for the analysis of volatile compounds in alcoholic beverages
Highlights
The certified reference material (CRM) is one of the important instruments in analytical chemistry for validation of analysis methods and assessment of the trueness of the results, obtained in analysis [1]
Theresultsof characterization of prepared solutions showed, that developed algorithm of calculations of mass concentrations in Water-ethanol solution (WES) allows to specify the values of calibration coefficients for acetaldehyde, methanol and propan-2-ol on 0.2, 1.2 and 0.3 % relative, correspondingly (Table S.1.1 of Supplementary material)
The official method for the analysis of volatile compounds in alcoholic beverages [10] involves the preparation of standard solutions for further analysis, but there is no method for assessing the mass concentrations of target volatile compounds in a water-ethanol solution for preparation
Summary
The certified reference material (CRM) is one of the important instruments in analytical chemistry for validation of analysis methods and assessment of the trueness of the results, obtained in analysis [1]. Review of offers of RM and CRM for analysis of alcoholic beverages showed, that there are two main manufacturers of such products – LGC Standards and Sigma-Aldrich These RM and CRM largely are 1) the water-ethanol mixtures with exact value of concentration of ethanol for determining of strength of alcoholic beverage(wine, beer, lager, brandy and whiskey)[2]; 2) matrix whiskey material (Certified Reference Material LGC5100 Whisky-Congeners) [3], which contains 6 volatile compounds: methanol, propan-1-ol, 2-methylpropan-1-ol, butan-1-ol, 2-methylbutan-1-ol and 3-methylbutan-1-ol and presents. The quality control material (QCM), variously referred to in the literature as “in-house reference material”, can partially perform CRM and RM functions in terms of an assessment of repeatability, intermediate precision and reproducibility [4] For this reason, the water-ethanol solutions with 9 volatile compounds (acetaldehyde, methyl acetate, ethyl acetate, methanol, propan-1-ol, propan-2-ol, butan-1-ol, 2-methylpropan-1-ol and 3methylbutan-1-ol) were proposed as quality control material (QCM). The choice of 9 of these volatile compounds is due to the fact that they are the most researched for the method in previous studies [5-8], and the most frequently analyzed volatile compounds of alcoholic products
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