›› 2014, Vol. 26 ›› Issue (1): 0-134.

• 植物保护 •    下一篇

液相色谱法同时测定豇豆中吡虫啉和啶虫脒残留

刘景坤1,2, 武春媛1,2,邓晓1,2,陈珊珊1,2,李勤奋1,2,*
  

  1. 1中国热带农业科学院 环境与植物保护研究所,海南 海口 571101;2农业部儋州农业观测站,海南 儋州 571737
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2014-01-25 发布日期:2014-07-09

Simultaneous detection for residue of imidacloprid and nitenpyram in cowpea using HPLC method

LIU Jing\|kun;WU Chun\|yuan;DENG Xiao;CHEN Shan\|shan;LI Qin\|fen;*   

  1. 1 Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China;2 Danzhou Scientific Observing and Experimental Station of Agro\|Environment, Ministry of Agriculture, Danzhou 571737, Chin
  • Received:1900-01-01 Revised:1900-01-01 Online:2014-01-25 Published:2014-07-09

摘要: 经过紫外扫描确定吡虫啉和啶虫脒的最大紫外吸收波长分别为270和246 nm,通过改变其比例优化出峰时间和分离度,确定V(乙腈)∶V(水)=3∶7为流动相,建立了两种农药的标准曲线,结果表明在005 ~ 5 μg·mL-1范围内线性关系均良好。进行样品加标回收实验,用乙腈提取,C18固相萃取柱净化,上述条件进行下分析,01,05,15 mg·kg-1三个加标浓度回收率均在75% ~ 110%,变异系数< 5%,准确性和稳定性都较好,方法最低定量限001 μg·g-1,完全可以用于实际样品的检测。

关键词: 吡虫啉, 啶虫脒, 固相萃取\|高效液相色谱法, 定量限, 回收率

Abstract: The maximum absorption wavelength of imidacloprid and nitenpyram detected by UV spectrophotometer were 270 nm and 246 nm. To get optimum retention time and separation, the mobile phase should be acetonitrile and water (V/V, 3∶7). Standard curves of two pesticides were developed, which fit a linear regression ranging from 005 to 5 μg·mL-1. After extracted by homogenate with acetonitrile and purified by C18 SPE column, the recovery rates of the two pesticides were 75%~110% at the levels of 01mg·kg-1, 05mg·kg-1 and 15mg·kg-1 with a RSD less than 5%, which showed a good accuracy and stability. This method with a limit of quantification (LOQ) of 001μg·g-1 could be used in the practical detections.

Key words: imidacloprid, acetamiprid, SPE\|HPLC, LOQ, recovery