| Objective To understand the pollution level of pesticide residues in vegetables sold in Tibet. Methods In August 2024, 50 vegetable samples (eggplant, celery, lettuce, cucumber, broccoli) were randomly collected from five cities in the Tibet Autonomous Region. 43 pesticide residues were detected by LC-MS, And based on the principle of maximizing risk, the maximum residual amount is used for dietary exposure risk assessment. Results The detection rate of pesticides in 50 vegetable samples was 6.05%, with a total of 14 pesticides detected, with the highest detection rate being enoxymorpholine. The pesticide exceedance rate in 50 vegetable samples was 0.326%, and a total of 3 types of exceedance pesticides were detected, with the highest exceedance rate being avermectin. Pesticide residues had been detected in 5 cities, with the exception of Naqu City, the other 4 cities had exceeded the standard. The chronic ingestion risk values of pesticides detected in 5 types of vegetables were: Eggplant (0.008-0.122 mg/kg), celery (0.042-36.042 mg/kg), lettuce (0.005-6.817 mg/kg), cucumber (0.002-1.300 mg/kg) and broccoli (0.008-2.300 mg/kg). Conclusion Different levels of pesticide residues can still be detected in 50 vegetables sold in Tibet, but the residue level is low; the chronic intake risk values of 5 types of vegetables are all far below 100%, and the health risks of residents ingesting pesticide residues in vegetables through dietary pathways are within an acceptable range. |
