Discussion on the multi-residue detection method for banned pesticides in Chinese Pharmacopoeia(2020 edition)based on LC-MS/MS
[Aims]Discussion on the detection method for multi-residue of banned pesticides in Chinese Pharmacopoeia(2020 edition).[Methods]Based on the detection method for banned pesticides multi-residue in Chinese Pharmacopoeia(2020 edition),29 banned pesticides suitable for LC-MS/MS were selected and tested with Codonopsis radix as matrix,the residues of banned pesticides in roots(CODONOPSIS RADIX),leaves(EUCOMMIAE FOLIUM),flowers(SOPHORAE FLOS)and fruits(CITRI GRANDIS EXOCARPIUM)were determined,then the results were compared and analyzed.[Results]The linear relationship of the banned pesticides was good(r＞0.993).The limit of quantification(LOQ)was 0.1-9.7 µg/kg.The average recovery was 65.1％-107.2％and the RSD was 0.5％-9.0％.The matrix effect of the same pesticide had little difference among different materials,and the effect of different materials and different pretreatment methods on impurity removal and recovery were obvious.[Conclusions]When the detection method for banned pesticides multi-residue in Chinese Pharmacopoeia(2020 edition)is used,it is suggested to classify the medicinal materials and enrich the general technical requirements,expected to provide reference for the analysis and detection of banned pesticides in Chinese medicinal materials.
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