【摘要】 采用溶胶-凝胶技术制备了新多金属氧酸盐[Bu4N][Ni(pph3)2]PW11O39(Bu为四丁基,pph为苯基磷)有机-无机杂化材料修饰电极,该修饰电极不仅保持了本体溶液的电化学和电催化性质,而且还具有很好的稳定性与灵敏度.研究表明,优选条件下修饰电极在pH=4.5的缓冲溶液中,其催化电流与NO2-浓度在6.0×10-6~1×10-3mol/L范围内呈良好的线性关系,对不同基质环境水样的加标回收率为97%~102%,方法的检出限为1.0×10-7mol/L,对1.0×10-4mol/L NO2-平行测定10次的相对标准偏差(RSD)为1.96%.更多还原

【Abstract】 A novel polyoxometalates [Bu4N][Ni(pph3)2]PW11O39 was prepared as organic-inorganic hybrid material for modified electrode by the sol-gel technique.The modified electrode not only maintains its property in solution,but also has high stability and sensitivity.The research results indicate that under selective conditions a catalytic current of the modified electrode shows a favorable linear relation for cNO2-at range of 6.0×10-6～ 1×10-3 mol/L in pH=4.5 buffered solution.The recoveries of standard addition of nitrite are 97%～102%.The detection limit is 1.0×10-7 mol/L(Signal-to-Noise=3).The relative standard deviation for 1.0×10-4 mol/L NO2-is 1.96%(n=10).更多还原