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Evaluation of uncertainty in determination of five kinds of carbamate pesticide residues in apple by liquid chromatography-post-column derivatization

Food and Machinery, ISSN: 1003-5788, Vol: 38, Issue: 9, Page: 72-76
2022
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Article Description

Objective: This study aimed to analyze the accuracy of determination results of five kinds of carbamate pesticide residues in apple. Methods : Five kinds of carbamate pesticide residues in apples were detected according to NY/T 761-2008, and the uncertainty of the determination process was evaluated and analyzed. Results : The contents of carbosulfur, methomyl, 3- hydroxycarbamate, aldicarb and isoprocarb in apples are expressed in the form of expanded uncertainty as (0. 1057 ± 0. 0078), (0.1077 + 0.0062), (0.1092 + 0.0058), (0.1039 + 0.0084), (0.1061 + 0. 0076) mg/kg (k =2). Conclusion: The main sources of uncertainty in the experiment are standard material, recovery rate, sample pretreatment, and detection equipmenand the overall expression is U(Standard) > U (Recovery Rate), Urel(Pretreatment), U(Instrument).

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