摘要
对烟草和土壤中精甲霜灵(Metalaxyl-M)采用丙酮/甲醇(1:1,v/v)提取,弗罗里硅土加活性炭混合层析柱净化,液相色谱紫外检测器(UV)测定。试验结果表明,鲜烟叶、土壤中精甲霜灵回收率分别为92.14%～97.12%、93.36%～96.46%;相对标准偏差分别为3.2%～4.8%、2.2%～2.9%。精甲霜灵在烟叶中的消解较快,半衰期为1.2～1.5d;而在土壤中相对较慢,半衰期为6.39～12.77d。
Metalaxyl-M residues in tobacco leaves and soil were analyzed by high performance liquid chromatography. In this method residues were extracted with acetone and methyl alcohol, cleaned up on a column of florisil and activated carbon mixtures, and determined with an ultraviolet （UV） detector. Recoveries were 92.14%-97.12% for fresh leaves and 93.36%-96.46% for soisl respectively, and relative standard deviations （RSDs） were 3.2%-4.8% and 2.2%-2.9% respectively. The degradation rates of metalaxyl-M were faster in tobacco leaves than in soils, and the degradation half-life times were 1.2-1.5 days in tobacco leaves and 6.39-12.77 days in soils.
出处
《中国烟草科学》
CSCD
2007年第3期35-37,42,共4页
Chinese Tobacco Science
关键词
烟草
精甲霜灵
高效液相色谱
残留分析
tobacco
metalaxyl-M
high performance liquid chromatography
residue analysis
