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The multiresidue determination of pesticides in barley and malt by the LC/MS method with QuEChERS extraction
 Posoldová, Kateřina ; Pernica,, Marek (referee) ; Mikulíková, Renata (advisor)
The topic of this thesis is the determination of pesticides in barley and malt. Barley is one of the second most cultivated cereals in the Czech Republic. In order to achieve higher yields, higher grain quality, and avoid losses, plant protection products - pesticides - are used. The disadvantage of their use is their negative impact on human and animal health and the environment. Residues of pesticides and their metabolites can remain in a food, so it is a good idea to monitor their content. There are various options for determination, but recently the QuEChERS extraction method has been used, which speeds up the whole sample preparation process. The practical part summarizes the optimization and validation of the QuEChERS method and the subsequent quantification of analytes by UPLC-MS/MS. The content of 148 pesticides in 30 barley and 20 malt samples from the 2021 harvest in the Czech Republic was analysed.
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