摘要
构建了新型的以硫化铅纳米空球包埋膜组分为载体的聚氯乙烯膜铅离子选择电极.电极对铅离子的响应在1×10^(-2)~1×10^(-5) mol·L^(-1)浓度范围内有线性关系,斜率为26mV/pC,检测下限为7.1×10^(-6) mol·L^(-1).膜厚约0.3 mm的聚氯乙烯膜铅离子选择电极在1×10^(-1)~1×10^(-2),1×10^(-3)~1×10^(-5)及1×10^(-6)~1×10^(-) mol·L^(-1)的铅离子溶液中,其响应时间分别为9~15,20~45和55~70s.在1×10-3 mol·L^(-1)铅离子溶液中电极电位稳定的pH范围为3~7,银离子对电极的测量有一定的干扰.
A novel type PbS hollow nano-sphere bag burried in membrane fractions was designed and manufactured as carrier of lead ions on the PVC membrane ion selective electrode.The response of the electrode was linear relationship to the lead ion with concentration between the range of 1×10^(-2)~1×10^(-5)mol·L^(-1),with the slope of 26 mV/pC and the lower detected limit of 7.1×10-6 mol·L^(-1).PVC membrane of about 0.3 mm thickness was put in the lead ion solution with concentration of 1×10^(-1)~1×10^(-2),1×10^(-3)~1×10^(-5) and 1×10^(-6)~1×10^(-7) mol·L^(-1),and the response time was 9~15,20~45and 55~70srespectively.In the 1×10^(-3) mol·L^(-1) lead ion solution,the range of pH was 3~7while electrode potential was stable and the silver ion had a certain interference on electrode.
基金
安徽省高校自然科学研究基金(KJ2015A224)资助
