| 梁俊,李海飞,赵政阳,樊明涛.毛细管气相色谱法测定苹果中氯氟氰菊酯残留[J].干旱地区农业研究,2008,(2):49~52 |
| 毛细管气相色谱法测定苹果中氯氟氰菊酯残留 |
| Determination of cyhalothrin pesticide residue in apple by capillary GC method |
| |
| DOI：10.7606/j.issn.1000-7601.2008.02.09 |
| 中文关键词: 气相色谱 苹果 氯氟氰菊酯 残留量测定 |
| 英文关键词:gas chromatography apple cyhalothrin determination |
| 基金项目:国家“十一五”科技支撑计划课题(2006BAK02A24)； 陕西省重大科技创新计划(2006ZKC(一)05-01) |
|
| 摘要点击次数: 380 |
| 全文下载次数: 273 |
| 中文摘要: |
| 建立了苹果中氯氟氰菊酯残留量的乙腈提取、弗罗里硅土(Florisil)层析净化、毛细管气相色谱-电子捕获检测器测定方法,对苹果中的氯氟氰菊酯残留进行了测定。本研究对苹果样品中农药残留提取采用乙腈代替传统的丙酮-石油醚作为提取剂,提取率高,提取溶液干净。通过Florisil层析柱净化,毛细管气相色谱—电子捕获检测器测定,既节省了溶剂用量、时间,又简化了预处理步骤。隔垫吹扫和玻璃衬管内填充玻璃棉消除了因样品蒸发的反扩散、吸附和垫片流失所造成的色谱峰拖尾和鬼峰的干扰。本方法得到的苹果全果、果皮和果肉中氯氟氰菊酯添加回收率分别达到92.54%±2.3%103.32%±4.4%、96.00%±2.8%101.23%±2.9%和92.50%±3.6%104.02%±2.9%;氯氟氰菊酯的最小检出限为5.70×10-11g,方法简单、快速,且回收率和灵敏度高,变异系数小。 |
| 英文摘要: |
| The method on determination of cyhalothrin pesticide residues by capillary GC in apple was established,and the cyhalothrin residues in apple were determined by the method.The residues were extracted from apple with acetonitrile which substitute the mixture of acetone and petroleum ether,and the extraction solution had little impurity and was comparatively clean,decontaminated with Florisil,and determined by GC with electron capture detector,the step of preparation was simplified,and the method reduced solvent consumption,saving time,as well.The method of infilling glass cotton in glass inner tube avoided the disturbance of chromatography peak and impurity peak which because reverse pervasion and adsorption of sample vapor and septum lose.The recoveries of the three spiked levels of cyhalothrin were from 92.54%±2.3% to 103.32%±4.4% in whole apple,from 96.00%±2.8% to 101.23%±2.9% in apple peel and from 92.50%±3.6% to 104.02%±2.9% in apple pulp.The minimum detection limits of cyhalothrin were 5.70×10-11 g. It was a sensitive,simple and reliable method to determine the residues of cyhalothrin in apple,the result of recovery rate and coefficient of variation and minimum detection limits were famous. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |