Full
Outline
To establish a method for the detection of residues of 6 kinds of pesticides such as pyrazolimide and benzophenone in vegetables by QuEChERS-gas chromatography-tandem mass spectrometry(GC-MS/MS).
Adopted the improved QuEChERS-GC-MS/MS for detection. The samples were extracted with acetonitrile, separated by SH-1-5SILMS capillary chromatographic column (30 m×0.25 mm, 0.25 µm), and the multiple reaction monitoring (MRM) scanning mode was used to monitor the target ions of pesticides.
The linear relationship of the 6 kinds of pesticides was good within the range of 0.002–0.200 mg/L, and the correlation coefficient (r2) was all greater than 0.998. The limits of detection were 0.33–1.23 µg/kg, the limits of quantitation were 1.10–4.09 µg/kg, and the average recovery rates were 93.66%–111.29%. The relative standard deviation ranged from 2.79% to 11.27%.
This method enables qualitative and quantitative analysis of 6 kinds of pesticide residues, including pyrazoleanilide and benomyl, in vegetables. Characterized by good repeatability, low cost, and efficient convenience, it provides a methodological reference for routine testing of such residues in China. It offers robust technical support for advancing pesticide residue detection techniques and enhancing safety oversight within relevant industries.
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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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