Dissipation Behavior of Three Fungicides during the Industrial Processing of Paeoniae Radix Alba and Associated Processing Factors

Sheng-Nan Li, Ming-Na Sun, Fan Wang, Xing Xu, Xin-Hong Zhang, Jin-Juan Ma, Jin-Jing Xiao, Min Liao and Hai-Qun Cao
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Sheng-Nan Li: School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
Ming-Na Sun: Institute of Plant Protection and Agro-Product Safety, Anhui Academy of Agricultural Sciences, Key Laboratory of Agro-Product Safety Risk Evaluation (Hefei), Ministry of Agriculture, Hefei 230031, China
Fan Wang: School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
Xing Xu: Provincial Key Laboratory for Agri-Food Safety, Anhui Agricultural University, Hefei 230036, China
Xin-Hong Zhang: School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
Jin-Juan Ma: School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
Jin-Jing Xiao: School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
Min Liao: School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
Hai-Qun Cao: Institute of Plant Protection and Agro-Product Safety, Anhui Academy of Agricultural Sciences, Key Laboratory of Agro-Product Safety Risk Evaluation (Hefei), Ministry of Agriculture, Hefei 230031, China

IJERPH, 2019, vol. 16, issue 12, 1-11

Abstract: Before being administered as medicinal products, Chinese herbal medicines (CHMs) must be processed and decocted for human consumption. While the presence of pesticide residues in CHMs is a major concern, pesticide dissipation behavior during CHM processing has rarely been reported. In this study, the dissipation of three pesticide residues in the CHM Paeoniae Radix Alba (PRA) was investigated during each step of industrial processing. The boiling process was found to significantly reduce pesticide residues (61–89%), and the peeling process also contributed to pesticide degradation (29–68%). The high temperature (60 °C) during the drying process led to further pesticide degradation. The processing factors of all three pesticides after each processing step were less than one, and the processing factors for the overall process were lower than 0.027, indicating that industrial processing clearly reduced the amount of pesticide residues (97.3–99.4%). The findings provide guidance for the safe use of fungicides in CHMs and can help establish maximum residue limits for PRA to reduce human exposure to pesticides.

Keywords: processing factors; fungicide; pesticides residues; Paeoniae Radix Alba (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
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