Full
Outline
To evaluate the pesticide residue levels and their distribution characteristics in commercial tea products.
In this study, 73 kinds of pesticide residues were detected and analyzed in 132 randomly collected commercial tea samples, in accordance with the GB 2763—2021 National food safety standard-Maximum residue limits for pesticides in food and the GB 2763.1—2022 National food safety standard-Maximum residue limits for 112 pesticides including sodium 2, 4-dichlorophenoxyacetate. Quality control measures such as spiked recovery experiments were adopted to ensure data accuracy.
The overall qualified rate of the samples was 99.24%, with only one oolong tea sample exceeding the maximum residue limits for fenvalerate and S-fenvalerate. The total pesticide detection rate was 50.00%, and 18 kinds of pesticides were detected in total. Among them, carbendazim (35.61%), acetamiprid (28.79%) and bifenthrin (16.67%) constituted the main risk combination, showing obvious tea-type preference. Further analysis revealed significant differences in pesticide residues among different tea categories. Oolong tea (68.42%) and reprocessed tea (68.18%) exhibited significantly higher pesticide detection rates and more detected pesticide species (11 kinds and 13 kinds, respectively) than other tea types, representing relatively high-risk categories.
The quality and safety of commercially available tea are generally controllable at present, but pesticide application is relatively common. It is still necessary to focus on the pesticide residue risks of oolong tea and reprocessed tea, strengthen the supervision of pesticides with high detection rates such as carbendazim, as well as restricted and banned pesticides like fenvalerate and S-fenvalerate, so as to promote the sustainable development of the tea industry.
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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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