气相色谱-双塔双柱检测系统在蔬菜水果农药残留检测上的应用

Application of Gas Chromatography and Twin Towers Dual Column Detection System in Detection of Vegetables and Fruits Pesticide Residues

[目的]利用检测技术,更快、更有效地控制蔬菜水果的农药残留量问题。[方法]蔬菜水果样品经乙腈提取、浓缩、净化后,采用GC-2010双塔双柱系统,搭配双FPD检测器对其中的有机磷农药残留进行分离和检测。[结果]试验得出,供试蔬菜水果中农药在0.02-0.20 mg/L浓度范围内标准曲线线性良好,相关系数均在0.994 0以上,样品加标回收率在70%-120%,0.1 mg/L标样连续5次进样,峰面积RSD值均小于8.0%,精密度良好。[结论]该试验方法缩短了样品分析时间,方法简单、高效,定性定量更加准确可靠。

[Objective] Using detection technology to fast and efficient control pesticide residues in vegetables and fruits. [Method] After acetonitrile extraction,concentration and purification,using GC- 2010 twin towers dual column system,combined with FPD detector,organophosphorus pesticide residues in vegetables and fruits were separated and detected. [Result] The standard curve linear relationship is good when pesticide in 0. 02- 0. 20 mg / L,the correlation coefficient is above 0. 994 0,sample recovery ratio is 70%- 120%,adding 5 times of0. 1 mg / L,peak area RSD value is less than 8. 0%,the precision degree is good. [Conclusion] The test method shorten samples analysis time,which is simple,high efficient and accurate.