流动注射-化学发光法测定农药敌敌畏的残余量

研究了农药敌敌畏在碱性介质中与鲁米诺 过氧化氢产生化学发光的特性， 发现非离子表面活性剂聚乙二醇辛基苯基醚（乳化剂OP）对该反应有明显的增敏作用， 建立了鲁米诺 过氧化氢 OP体系测定敌敌畏的流动注射化学发光的新方法. 结果表明, 敌敌畏浓度在8.00×10－8～2.50×10－5　g/mL与化学发光强度有良好的 线性关系， 该方法的检出限为2.20×10－8　g/mL. 3种样品加标准回收率为94.0%～104%， 相对标准偏差为4.27%～5.75%.

Determination of Dichlorvos Residues by Flow-injection Chemiluminescence Method

A new flow injection chemiluminescence(FICL) method for the determination of dichlorvos was developed. The method is based on the CL reaction of dichlorvos with luminol H2O2in the alkaline medium and sensitized by the nonionic surface active agent polyoxyethyle octyl phenyl ether. The results show that the CL intensity is linear to the concentration in the range of 8.00×1 0－8～2.50×10－5　g/mL， with a detection limit of 2.20×10－8g/mL.　The standard addition recovery and relative standard deviation (n=6) of three samples were 94.0%～104% and 4.27%～5.75%, respectively. This method has been applied to the determ ination of dichlorvos residues in crops and vegetables.