摘要
研究了黄芪中的氨基甲酸酯农药（包括呋喃丹、西维因、甲霜灵）残留量的毛细管气相色谱测定方法。采用正己烷－丙酮混合溶剂提取，经柱层析净化后，用ＳＥ－３０毛细管柱为分离柱，ＦＴＤ（火焰热离子检测器）检测，３种农药在２０ｍｉｎ内获得良好的分离。该法灵敏度高，且易操作。当添加水平为０．２×１０－６时，回收率为８９．３３％～９８．１８％，线性相关系数ｒ为０．９９７０～０．９９８５，检测限可达１９．０ｐｇ。
A method for determination
of methylcarbamate pesticides residue(including furadam, sevin, metalaxyl) in Radix Astragali
by capillary gas chromatography was investigated. The three pesticides could be well
separated within 20 min in a SE-30 capallary column after pretrating of sample by extacting with
n _ hexane-acetone mixing system and cleaning up with a chromatographic column. The
pesticides were detected with flame thermionic detector(FTD). The method is highly sensitive
and easy in operation. As a spiked level was 0.2×10-6, the recovery of the method for the
pesticides were 89.33%～98.18 %, the correlation coefficient ranged from 0.997 0 to 0.998 5, the
detection limit was 19.0 pg.
出处
《分析测试学报》
CAS
CSCD
1999年第2期66-68,共3页
Journal of Instrumental Analysis
关键词
GC
黄芪
氨基甲酸酯
农药残留
测定
中药材
Capillary chromatography, Radix Astragali,
Methylcarbamate pesticide, Residue
