14 There are some other methods for the quantitative analysis of particular groups of pesticides, such as acaricides11,12 or lipophilic pesticides,17 using either LC or GC techniques.2,3,18 Mullin et al. analyzed 259 real samples from beehives in the United States covering a very broad scope of GC- and LC-amenable analytes. A total of 87 different pesticides and metabolites were identified using the QuEChERS approach as sample preparation method. Nevertheless, the evaluation of the analytical method employed was not published.19 The methodologies employed in the studies mentioned above involved mainly beeswax dissolution followed by liquid-liquid extraction and solid phase extraction for cleanup. A simple variation of the QuEChERS method20 allowing the determination of 51 pesticides in beeswax by LC and GC is presented in this work. Thirteen GC-amenable and 38 LCamenable pesticides employed in this study were selected on the basis of their relevance for beeswax as reflected by the frequency of residue findings in beeswax and other apiarian products according to the literature and the pesticides-online
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