色谱Issue(3)：268-277,10.DOI:10.3724/SP.J.1123.2013.11046
气相色谱-四极杆飞行时间质谱准确鉴定常见水果蔬菜中的农药残留
Identification of pesticide residues in common fruits and vegetables by gas chromatography-quadrupole time-of-flight mass spectrometry
摘要
Abstract
A new screening method was developed for the determination of 152 pesticide multi-residues in different chemical species with a Carbon NH2 column using solid-phase extraction (SPE)coupled with gas chromatography-quadrupole time-of-flight mass spectrometry(GC-QTOF MS). In the first stage( MS1 )accurate mass database,up to three-five ions of the pesticides were monitored. The presence of at least three ions and the accomplishment of the intensity ratio(Q/qi )within the established tolerances were used as the confirmation of intensity crite-ria. The pesticides which have less characteristic ions or the peaks of the characteristic ions detected were up the tolerance were determined in the second stage( MS2 )and the spectral difference was evaluated using MS2 library for the identified. Cabbage,tomato,pear were selected as typical fruits and vegetables to spike and detected all the 152 pesticides at two con-centration levels of 5.0 and 10.0 μg / kg. The recoveries in the range of 70% -120% at two con-centration levels were 91.45% and 94.08% for cabbage,88.20% and 88.80% for tomato,86.84%and 92.10% for pear respectively. Using the established 152 pesticide MS2 library some suspec-ted pesticides were identified,and at the same time the analysis scope was expanded.关键词
气相色谱-四极杆飞行时间质谱/农药残留/常见水果/常见蔬菜Key words
gas chromatography-quadrupole time-of-flight mass spectrometry ( GC-QTOF /MS)/pesticide residues/common fruits/common vegetables分类
化学化工引用本文复制引用
李晓颍,张红医,常巧英,范春林,庞国芳,曹喆,王雯雯..气相色谱-四极杆飞行时间质谱准确鉴定常见水果蔬菜中的农药残留[J].色谱,2014,(3):268-277,10.基金项目
“十二五”国家科技支撑计划项目（2012BAD29B01）． （）
