A flow-batch analyzer for UV-Vis spectrophotometric detection of adulteration in distilled spirits

Journal of the Brazilian Chemical Society

Elaine C. L. Nascimento²  Mário C. U. Araújo¹  Roberto K. H. Galvão¹ 

[1] ,Universidade Federal Rural de PernambucoSerra Talhada PE ,Brazil

关键词: flow-batch analyzer;    SIMCA;    UV-Vis spectrophotometry;    adulteration of distilled spirits;    screening analysis;   

DOI  :  10.1590/S0103-50532011000600009

来源: SciELO

【 摘 要 】

An automatic flow-batch analyzer is proposed for detection of adulteration in distilled spirits (whiskey, brandy, cachaça, rum and vodka) using UV-Vis spectrophotometry. The analyzer was employed to dilute the non-adulterated samples and to simulate adulteration with addition of 5 and 10% (v/v) of water, ethanol or methanol. SIMCA (soft independent modelling of class analogies) classification models were built using spectra of non-adulterated and adulterated samples in the region of 235-355 nm. By applying the SIMCA models to a test set, all adulterated and non-adulterated samples were correctly discriminated at a confidence level of 95% with an analytical throughput larger than 120 samples per hour.

【 授权许可】

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