摘要
建立了同时测定海水中16种除草剂的气相色谱-质谱检测方法。样品用固相萃取仪过HLB柱浓缩、净化,洗脱液氮吹至近干,乙酸乙酯定容,用气相色谱质谱仪选择离子监测模式（SIM）进行检测,外标法定量。该方法中草净津、二甲戊乐灵的检出限为10.0 ng/L,其余14种除草剂的检出限为5.0 ng/L;草净津、二甲戊乐灵的线性范围为4.0～200μg/L,其余14种除草剂的线性范围均为2.0～100μg/L;方法加标回收率为78.3%～115.0%,相对标准偏差为4.4%～9.9%。该方法操作简单,精确度高,适用于海水中16种除草剂的定性定量检测。
A method was established for the determination of 16 kinds of herbicides in seawater by gas chromatography -mass spectrometry （GC -MS）. The samples were concentrated, purified and eluted on an HLB solid phase extraction cartridge, and the elutions were evaporated to near dryness by nitrogen blow. Then the analytes were dissolved with ethyl acetate, determined by GC - MS in se- lected ion monitoring mode and quantified by the external standard method. The experimental results showed that good linearities for cynazine and pendimethalin existed in the range of 4. 0 - 200 μg/L with their detection limits of 10. 0 ng/L. The other 14 herbicides showed good linearities in the range of 2.0 - 100 μg/L, and their detection limits were all 5.0 ng/L. The average recoveries ranged from 78.3% to 115.0% with relative standard deviations of 4. 4% -9.9% . The method is simple and ac- curate, and is specially suitable for the detection of 16 kinds of herbicides in seawater.
出处
《分析测试学报》
CAS
CSCD
北大核心
2016年第7期839-843,共5页
Journal of Instrumental Analysis
基金
山东省现代农业产业技术体系贝类产业创新团队(2016-2020)
藻类产业创新团队(2016-2020)
山东省水生动物营养与饲料泰山学者岗位项目(2007-2012)
关键词
除草剂
海水
气相色谱-质谱法
固相萃取
herbicides
seawater
gas chromatography - mass spectrometry （ GC - MS）
solid phase extraction （SPE）
