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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 5 cities in the Tibet Autonomous Region. The 43 kinds of pesticide residues were detected by liquid chromatography-tandem mass spectrometry, and a risk assessment dietary exposure was conducted. Results The detection rate of pesticides in 50 vegetable samples was 6.05%, with a total of 14 kinds of 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 kinds 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 kinds of vegetables were: Eggplant (0.001-0.023 mg/kg), celery (0.006-3.665 mg/kg), lettuce (0.001-0.697 mg/kg), cucumber (0.001-0.188 mg/kg) and broccoli (0.002-0.463 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 kinds 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.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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