Analysis method development and health risk assessment of pesticide and heavy metal residues in Dendrobium Candidum.

ABSTRACT: Herbal medicines that are widely used worldwide are easily contaminated by pesticides and heavy metals, threatening human health. In this study, a modified QuEChERS pre-treatment method combined with HPLC/GC-MS/MS was established for the determination of 24 pesticide residues in Dendrobium candidum. The average recoveries of 24 pesticides in D. candidum were 76.9-110.0% with the relative standard deviation (RSD) of 0.28-11.40%, and their limits of detection (LOD) and limits of quantitation (LOQ) were 0.005-10 and 0.011-22 μg kg^-1, respectively. The results showed that 83.33% of all samples had detected pesticide residues with the concentrations of 0.06-312.83 μg kg^-1. Meanwhile, microwave digestion combined with ICP-MS was used to detect the residues of

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC8981595 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature