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To establish a UPLC-MS/MS method for the simultaneous determination of 47 pesticide residues in Sucrose.
The residues in the sample were extracted by acidic acetonitrile, concentrated by blow dry with nitrogen gas and then analyzed by using LC-MS/MS with multiple reaction monitoring(MRM). Blank matrix standard curve with internal standard method was used to determine the residue contents.
Each substance to be tested had good linearity relationship within certain concentration (r>0.995). The limits of quantification (LOQ) were 0.01-2.00 μg·kg-1. The recoveries of 47 pesticide residues at three levels of 10, 25 and 50 μg·kg-1 were from 71.0% to 106.0% with the RSD of 0.90%-8.5% in sucrose. 2 batches in 15 batches of sucrose samples were detected thiamethoxam and thiamethoxam, while the rest were not detected.
The method is simple, rapid and characterized with acceptable sensitivity and accuracy to meet the requirements of the determination of analysis, and this developed procedure is suitable for the determination of pesticide residues in Sucrose, can be used for quality control of sucrose.
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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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