Deme Pragney, Upadhyayula Vijayasarathi V R
National Centre for Mass Spectrometry, Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, Telangana, India.
National Centre for Mass Spectrometry, Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, Telangana, India.
Food Chem. 2015 Apr 15;173:1142-9. doi: 10.1016/j.foodchem.2014.11.007. Epub 2014 Nov 10.
A novel analytical method was developed for determination of organochlorine, synthetic pyrethroid, organophosphate and carbamate pesticide residues in fruit juices using ultra performance liquid chromatography-atmospheric pressure photoionization-high resolution mass spectrometry (UPLC-APPI-HRMS). The analytes were extracted from fruit juices by dispersive solid-phase extraction using multi-walled carbon nanotubes (MWCNTs). The analysis was carried out in full scan mode using dual ionization mode of APPI in the mass range of 100-650 units. The limit of detection and limit of quantification values for the pesticides were in the range of 0.025-0.15 ng mL(-1) and 0.1-0.5 ng mL(-1) respectively. The matrix effect of the method was found to be low and extraction recoveries were in the range of 60-110%. Some of the real fruits juice samples showed the presence of some pesticides in the range of 6.5-24.8 ng L(-1).
建立了一种新型分析方法，采用超高效液相色谱-大气压光电离-高分辨率质谱法（UPLC-APPI-HRMS）测定果汁中的有机氯、拟除虫菊酯、有机磷和氨基甲酸酯类农药残留。使用多壁碳纳米管（MWCNTs）通过分散固相萃取从果汁中提取分析物。采用APPI的双电离模式在100-650单位的质量范围内进行全扫描模式分析。农药的检测限和定量限分别在0.025-0.15 ng mL(-1)和0.1-0.5 ng mL(-1)范围内。该方法的基质效应较低，提取回收率在60-110%范围内。一些实际果汁样品中显示出存在浓度范围为6.5-24.8 ng L(-1)的某些农药。
