气相色谱法研究水稻中粉唑醇和嘧菌酯残留及其降解动态  

Determination of Flutriafol and Azoxystrobin in Paddy Samples Using Gas Chromatogrphy

作　　者：黄华[1] 陈力华[2,3] 梁骥[2,3] 马铭[1] 陈九星[2,3] 廖丹[1] 阳承虎 

机构地区：[1]湖南师范大学化学化工学院,湖南长沙410083 [2]湖南化工研究院国家农药创制工程技术研究中心,湖南长沙410007 [3]农用化学品湖南省重点实验室,湖南长沙410014 [4]湖南大学环境科学与工程学院,湖南长沙410082

出　　处：《精细化工中间体》2013年第5期71-76,80,共7页Fine Chemical Intermediates

基　　金：国家自然科学基金资助项目(2012F209)

摘　　要：建立了同时检测水稻中粉唑醇和嘧菌酯残留量的分析方法。糙米、植株、谷壳或土壤样品用乙腈提取,中性氧化铝-活性炭（50∶1,m/m）柱层析净化,采用基质标标准曲线,气相色谱-氮磷检测器（GC-NPD）检测。结果表明,在0.02~1.00 mg/kg添加水平范围内,粉唑醇、嘧菌酯在不同样品中平均添加回收率分别在88.2%~106.4%和82.4%~106.7%,方法的最低检出限为0.02 mg/kg。该方法采用基质标准工作曲线校正,能快速、准确检测水稻种植环境中粉唑醇、嘧菌酯残留量。利用所建立的方法对湖南、河北、江苏3地水稻植株及其土壤中粉唑醇和嘧菌酯的残留降解动态进行了研究,结果表明,粉唑醇和嘧菌酯在水稻植株和土壤中的消解趋势符合一级动力学消解模式。A fast,simple and reproducible gas chromatographic method was established for the determination of flutriafol and azoxystrobin residue in rice. The plant,chaff and soil samples were extracted with acetonitrile,cleaned up with column of neutral alumina-activated carbon,and analyzed with gas chromatography-nitrogen phosphorus detector（GC-NPD）by matrix standard curve correction. At the spiked level range from 0.02 mg / kg to 1.00 mg / kg,the average recoveries of flutriafol and azoxystrobin were 88.2%~106.4% and 82.4%~106.7% in different samples.The lower limits of detection of flutriafol and azoxystrobin were 0.02 mg / kg. The studies on the dynamic degration of flutriafol and azoxystrobin in rice field were carried out in Hunan,Hebei and Jiangsu provinces. The degradation curve was conformed to the first-order dynamic equation.

关 键 词：气相色谱 粉唑醇 嘧菌酯 水稻 残留 

分 类 号：O657.71[理学—分析化学]