Digitální knihovnaUPCE
 

26 (2020) Scientific papers, Series A

Permanentní URI k tomuto záznamuhttps://hdl.handle.net/10195/76706

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20202

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Typ: search.filters.itemtype.ArticlePředmět: search.filters.subject.gas chromatography

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  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    Classification of the alcoholic beverages by using electronic nose technique based on ultra-fast GC
    (University of Pardubice, 2020) Surmová, Silvie; Wiśniewska, Paulina; Śliwińska, Magdalena; Dymerski, Tomasz; Wardencki, Waldemar; Namieśnik, Jacek; Ventura, Karel; Adam, Martin; Eisner, Aleš
    Each alcoholic beverage has its own distinct aroma and unique flavor. An Electronic nose (E-nose) is an instrumental tool which allows one to analyze the aroma of samples. This work illustrates the use of E-nose for the determination of characteristic aromas of seven different alcoholic beverages (bourbon, brandy, cognac, vodka, liqueurs made from pears, and fruit spirits made from lemon). The following chemometrics methods for the data analysis were employed for the classification of alcoholic beverages: principal component analysis (PCA), discriminant factorial analysis (DFA, and soft independent modelling of class analogies (SIMCA). The results show that chemometrics methods PCA and DFA allow us the determination of the individual alcoholic groups of fruit spirits, bourbon, cognac, and brandy but there is a difficulty with separation of liqueur, gin, and vodka points from one group. Only the SIMCA method allowed to distinguish the point belonging to all groups without any approximation of graph fragments.
  • Náhled
    Článekpeer-reviewedpublishedOtevřený přístup
    Determination and profiling of fatty acids in dried breast milk spot
    (University of Pardubice, 2020) Kopčil, Michal; Janeček, Radim; Fukasová, Petra; Kanďár, Roman
    A method was developed for the determination of fatty acids in dried breast milk spot and plasma using gas chromatography with mass spectrometry and flame ionization detection. The breast milk was sampled onto a collection paper treated with butylated hydroxytoluene. Fatty acids were derivatized with acetyl chloride in methanol to form fatty acids methyl esters. Our results indicate that the concentrations of fatty acids found in human milk can be used for assessing the intake and needs of infants.