PDF
Full
Outline
Objective To establish a method for the determination of 6 kinds of carbamate pesticide residues in vegetables by high performance liquid chromatography (HPLC), and study the degradation rule of carbamate pesticides in vegetables. Methods The samples were extracted with acetonitrile to extract carbamate pesticides. The supernatant was purified by solid phase adsorbent, concentrated and dried, and then diluted with methanol. The quantitative analysis was carried out by HPLC-post column derivatization.Results Through optimization of the method, it was found that there was a good linear relationship between peak area and concentration of 6 kinds of carbamate pesticides in the mass concentration range of 0.10-2.00 μg/mL, with correlation coefficients not less than 0.9996. The limit of detection was 0.002-0.005 mg/kg, the average recovery rate was 86%-95%, and the relative standard deviation was less than 3.5%. At the same time, the residual status and degradation rule of amino esters in vegetables were obtained, and it was found that the order of pesticide residue content of methomyl was: Unwashed potato peel>washed potato peel>potato interior. Conclusion This method has high sensitivity, low limit of detection, good recovery rate and feasible operation, meeting the experimental requirements. The degradation rules of pesticide residues show significant differences, providing a theoretical basis for evaluating the safety of vegetables after the use of carbamate pesticides.
PDF
297
142
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
