Analysis of pesticides in water with liquid chromatography/atmospheric pressure chemical ionization mass spectrometry
Analysis of pesticides in water with liquid chromatography/atmospheric pressure chemical ionization mass spectrometry
复制标题
液相色谱/常压化学电离质谱法分析水中农药
DOI：
10.1016/s0043-1354(98)00235-8
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发表时间：
1999
期刊：
影响因子：
12.8
通讯作者：
Y. Magara
中科院分区：
文献类型：
--
作者：
Jianying Hu;T. Aizawa;Y. Magara
采用LC/APCI/MS作为多残留分析方法，测定处理水及其供水原水中的不耐热和/或极性农药，这是不适合常规GC/MS程序。在31种不耐热和/或极性农药中，除麦草畏（500μg/l）和草除灵（1000μg/l）外，中性或碱性农药的检出限在10 ~ 50 μ g/l之间，酸性农药的检出限在50 ~ 250μ g/l之间。通过源内碰撞诱导分解（CID）过程的结构信息显着改善。采用上柱填充聚苯乙烯/二乙烯基苯，下柱填充碳分子筛的固相萃取技术，建立了农药的固相萃取方法。的农药的提取回收率被认为是高于72%，在处理过的水和67%，在原水中，除了甲基托布津和稀禾定，这是不可能从处理过的水和原水中回收，回收率分别为60%和64%，在蒸馏水中。将多残留分析方法应用于日本新泻自来水厂的现场分析，在处理水中检出8种农药，在原水中检出10种农药。
LC/APCI/MS was used as a multiresidue analytical method for determining the thermolabile and/or polar pesticides in treated water and its raw water for water supply, which are not amenable to a routine GC/MS procedure. Of the 31 thermolabile and/or polar pesticides including 14 neutral or basic pesticides and 17 acidic ones used in this study, the detection limits for neutral/basic pesticides detected in positive-ion mode ranged from 10 to 50μg/l and the limits for acidic pesticides detected in negative-ion mode ranged from 50 to 250μg/l except for dicamba (500μg/l) and benazolin (1000μg/l). The structural information was significantly improved through an in-source collision-induced decomposition (CID) process. The solid-phase extraction (SPE) procedure, which used a special cartridge with its upper part filled with polystyrene/divinylbenzene and the lower part filled with carbon molecular sieve, was developed for extraction of the pesticides. The extraction recoveries of the pesticides were found to be higher than 72% in treated water and 67% in raw water except for thiophanatemethyl and sethoxydim, which were impossible to recover from treated water and raw water and were recovered at a recovery of 60 and 64%, respectively, in distilled water. When the multiresidue analytical method was applied to field analysis for Niigata public waterworks treatment plant in Japan, 8 pesticides were detected in treated water and 10 ones in its raw water.