GC/MS分析方法在食品农残检测中的应用

Application of GC/MS Technique for Analysis of Pesticide Residues in Foodstuffs

GC-MS具备灵敏度高、定性准确、多残留可同时检测等优点,在农残检测中得到了广泛的应用。通常GC/MS分析方法包括样本中残留农药的提取、净化以及检测。常用的样品预处理方法有液—液萃取法、固相萃取法(SPE)、固相微萃取法(SPME)、凝胶渗透法(GPC)、超临界萃取法、磺化法、冷冻法、凝结沉淀法等。美国已开发了一种较为简便易行的QuEch-ERS样品前处理方法,建立了检测水果和蔬菜样品中251种农药及其代谢物的残留GC/MS检测方法。日本也开发了用GC/MS同时检测101种农药残留的快速检测方法。另外GC/MS也应用到了脂肪性食品]以及葡萄酒等食品中多种农药的检测。在中国,GC/MS技术仅用于结果的确认,尚未建立标准的利用GC/MS检测农药多残留的分析方法。

Pesticide residue analysis methods are becoming more useable with the further research work and getting simple, quick, sensitive, low-cost and easy to use. Due to high sensitivity,reliable identification and multiresidues detection, GC-MS has been widely used. Normally GC-MS method includes extraction, purification and analysis of pesticide residues. Often used sample preparation means have liquid-liquid Extraction, Solid Phase Extraction (SPE), Solid Phase Micro-Extraction (SPME), Gel Permeation Chromatography (GPC), Super-Fluid Chromatography (SFC), Refrigeration, Precipitation and so on. U.S has made a simple and easy sample preparation method, named QuEch-ERS. U.S has developed GC-MS analysis method for 251 pesticides and their metabolite on fruits and vegetable, Japan has established fast screening method for 101 pesticides by GC-MS too. Otherwise, GC-MS is also used for fatty food and wine pesticide analysis. Although there already have some research works on pesticide residue analysis in our country, the standard methods almost use conventional instrument, such as GC, LC. GC-MS is only used for result confirmation, not for multiresidue analysis.