摘要
建立了同时测定9种酰胺除草剂和莠去津、嗪草酮残留量的气相色谱法。采用丙酮-水作提取溶剂,旋转蒸发去除提取液中丙酮后,加入氯化钠溶液,用正己烷提取,浓缩正己烷提取液,再用乙腈提取,弗罗里硅土固相萃取柱净化,净化液由气相色谱DB-35毛细管柱分离,微池电子捕获器测定,外标法定量。11种除草剂在大豆、大米样品的平均回收率为70.5%～96.0%,相对标准偏差小于6%(n=10),线性相关系数达0.9989以上,检测低限均为0.02mg/kg。该法灵敏、准确,各项技术指标均满足农药残留测定的要求。
A CA2 method for the determination of 9 acetanilide herbicides and atrazine, metribuzin residues in cereals and oil seeds was developed. Herbicide residues were extracted from rice and soybean samples with acetone-water mixture. Extracts were cleaned up with a Florisil SPE column and analyze by DB-35 capillary gas chromatography column. The recoveries obtained from rice and soybean samples spiked with standards are in the ranges of 70.5%-96.0%. Relative standard deviations（n= 10） are below 6%. Correlation coefficients are above 0.9989. Limits of quantitative of all herbicides are 0.02 mg/kg. The method is accurate, sensetive and suitable for the determination of herbicide residues.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2008年第2期310-313,共4页
Food Science
基金
国家质检总局制标项目(B089-2003)
关键词
毛细管气相色谱法
酰胺类除草剂
粮谷
油籽
capillary gas chromatography method
acetanilide herbicides
cereals
oil seeds
