第 43 卷第 5 期Vol. 43 No. 5
2013 年 10 月Oct 2013

所属栏目:分析与测试

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
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4 (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)
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。
关键词:气相色谱;粉唑醇;嘧菌酯;水稻;残留
中图分类号:O657.7+1  文献标识码:A  文章编号:1009-9212(2013)05-0071-06
Determination of Flutriafol and Azoxystrobin in Paddy Samples Using Gas Chromatogrphy
HUANG Hua1,CHEN Li-hua2,3,LIANG Ji2,3,MA Ming1,CHEN Jiu-xing2,3*,LIAO Dan1,YAN Cheng-hu4 (1. College of Chemistry and Chemical Engineering of Hunan Normal University,Changsha 410083,China;2. National Engineering Research Center for Agrochemicals,Hunan Research Institute of Chemical Industry,Changsha 410007,China;3. Hunan Province Key Laboratory for Agrochemicals,Changsha 410014,China;4. College of Environmental Science and Engineering of Hunan University,Changsha 410082,China)
Abstract: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.
Key words:gas chromatography;Flutriafol;Azoxystrobin;paddy;residue
基金项目:国家自然科学基金资助项目(2012F209)。
作者简介:黄 华(1987-),男,湖南郴州人,硕士研究生,研究方向为药物分析。(E-mail:403109272@qq.com)
联 系 人: 陈九星,研究员,从事农药残留及有机污染物分析研究。(E-mail:cjx1964_1@163.com)
收稿日期:2013-09-09