Residue of Organphosphorus Pesticides in Chewing Cane Juices Detected by QuEChERS and GC-NPD Method

摘要

[Objective] The paper was to establish a quick detection method for residue of organphosphorus pesticides in chewing cane juices and provide guarantee for edible safety of chewing juice.[Method] By using QuEChERS and GC-NPD method,a rapid analysis method for residue of six kinds of organphosphorus pesticides( dichlorvos,chlorpyrifos-methyl,malathion,fenthion,chlorpyrifos and triazophos) in sugarcane juices was established.[Result] QuEChERS method was significantly superior to traditional extraction method and could extract six kinds of organphosphorus pesticides from chewing cane juices effectively,which greatly saved organic reagent and time.Good linearity was found in different standard curves;when the concentration of pesticides was from 0.020 to 0.100 mg/L,the recovery rate was from 68.58% to 92.85%,and relative standard deviation( RSD) was ranged from 2.16% to 9.89%.[Conclusion] The sensitivity,accuracy and precision of QuEChERS method were consistent with the technical requirements of pesticide residue determination.It not only could shorten sample processing cycle effectively,but also ensure that no impurity was in the sample peak and the recovery rate was also consistent with the requirements of residual analysis.