摘要
为了快速、准确地测定面粉和大米中14种农药的残留量,采用丙酮提取,硅镁吸附剂柱层析净化,气相色谱法进行检测.不同浓度的添加回收率试验结果表明,农药在面粉和大米样品的添加回收率为76.17%～116.46%,变异系数为0.16%～16.24%,最小检测量为0.001 5～0.025 0 ng,该方法的灵敏度、准确度和精密度均符合农药多残留测定技术要求.
This paper is an attempt to probe into a rapid method for determination of residues of fourteen pesticides in wheat and rice by capillary gas chromatography.The samples were extracted with acetone and cleaned-up with florisil column.Fourteen pesticides fortified to wheat and rice were determined by capillary gas chromatography.The recovery rates and variation coefficients are 76.17%～116.46% and 0.16%～16.24% respectively.The range of lowest detectable quantity is 0.001 5 ng to 0.025 0 ng. The precision, detection sensitivity and linear relationship of the method all agree with the permitting range.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第2期161-164,共4页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家农业部资助项目(200108142)
关键词
气相色谱法
农药残留
面粉
大米
gas chromatography
pesticide residue
wheat
rice
