摘要
以四苯硼钠与甲胺磷在盐酸介质中生成的离子缔合物为电活性物质,首次研制出一种甲胺磷PVC涂层玻璃电极.并对该电极的响应机理及性能进行了研究.实验表明,该电极的Nernst响应范围为1×10^-2～1×10^-4（ψ）,斜率为50.28 mV/pψ.该电极响应迅速,重复性好,用于蔬菜中残留甲胺磷的测定,方法快速、准确,结果满意.
A newly developed methamidophos ion-selective electrode （M-ISE）, by incorporating PVC-membrane with methamidophos-tetraphenylboron ion pair complex on glass electrode, is reported in this presented paper. The response mechanism and the performance of the M-ISE are studied. It is found that the M-ISE＇s nernst response to methamidophos falls into the concentration range of 1×10^-2 - 1×10^-4（φ） with slope of 50. 28 mV/pφ. This M-ISE has been used for the detection of pesticide residue methamidophos in vegetable samples with satisfactory results.
出处
《分析测试学报》
CAS
CSCD
北大核心
2007年第2期239-241,244,共4页
Journal of Instrumental Analysis
关键词
甲胺磷
离子选择性电极
聚氯乙烯膜
农药残留
Methamidophos
Ion-selective electrode
Polyvinyl chloride membrane
Pesticide residue
