Full
Outline
To systematically understand the status of pesticide residues in commercially agricultural products in Shigatse, Xizang, and assess the level of food safety risks.
From 2022 to 2024, large-scale monitoring and analysis were carried out on agricultural products sold at major farmers’ markets, large supermarkets and origin direct supply outlets in Shigatse. Gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS) were adopted for the quantitative determination of 45 kinds of common pesticides, including organophosphates, carbamates, pyrethroids and neonicotinoids.
A total of 5229 samples were collected and tested, among which vegetables accounted for 57.2%, fruits 30.9%, and other agricultural products 11.9%. The overall qualified rate of pesticide residues in agricultural products from 2022 to 2024 was 97.3%. Leafy vegetables had the highest detection rate of pesticide residues (11.7%); among fruits, berries such as strawberries and grapes had a relatively higher detection rate. The pesticide residue levels of all samples were lower than the limit values specified in GB 2763—2021 National food safety standard—Maximum residue limits for pesticides in food. Meanwhile, the risk quotient (RQ) of all detected pesticides was significantly lower than 1.
Pesticide residues in commercially available agricultural products in Shigatse are generally within the national limit standards, and the dietary exposure risk is acceptable. Nevertheless, banned and restricted pesticides are occasionally detected. It is necessary to further strengthen publicity and guidance on scientific pesticide use as well as the supervision of agricultural product quality and safety.
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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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