Analysis on pesticide residues in vegetables and dietary exposure assessment, Ningbo City from 2020 to 2022

ObjectiveTo investigate the status of pesticide residues in vegetables sold in Ningbo City and assess the risk of the dietary exposure.MethodsFrom 2020 to 2022， 264 vegetable samples of 7 categories such as leaf vegetables were collected. And about 77 items of 8 major categories of pesticide projects were detected by LC-MS/MS. And the dietary exposure were evaluated by point evaluation method.ResultsThere are 175 vegetable samples were detected containing pesticide residues， and the detection rate is 66.29%（175/264）；According to the National Food Safety Standard for Maximum Residue Limits of Pesticides in Food （GB 2763—2021）， there are 21 vegetable samples have pesticide residues exceeding the standard， and the over-standard rate is 7.95% （21/264）， and there were 51.52% （136/264）vegetable samples with two or more pesticides； There is a statistically significant difference in the detection rates of pesticide residues in 7 types of vegetables （χ2＝32.474，P0.05）； There is a statistically significantdifference in the detection rates in 8 types of pesticide residues （χ2=276.317，P0.05）； There is a statistically significant difference in the exceeding rates in 8 types of pesticide residues （χ2=34.274，P0.05）. The acute dietary intake risk values （%ARfD） of all the detected pesticide are less than 100.00%， but the acute dietary intake risk values （%ARfD） of Cyhalothrin is 95.833， which is the highest among all the detected pesticides； And thedetected pesticide single food safety index values （IFS） were less than 1.00.ConclusionThe detection rate of pesticide residues in vegetables in Ningbo City is relatively high， and there is a phenomenon of over-standarding. However， the dietary exposure assessment show that the risks of pesticide residues in vegetables in Ningbo City are within an acceptable range for the general population.