冠醚化合物为载体的PVC膜新型铝离子选择电极研究(英文)  

A Novel Al^(3+)-Selective Electrode with Crane Ether as the Neutral Carrier

作　　者：张云[1,2] 袁若[1,2] 柴雅琴[1,2] 

机构地区：[1]西南大学化学化工学院,重庆400715 [2]重庆市现代分析化学重点实验室,重庆400715

出　　处：《西南大学学报（自然科学版）》2007年第9期63-67,共5页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20675064);重庆市自然科学基金资助项目(CSTC-2005BB4100);西南师范大学博士基金资助项目(SWUB2004021).

摘　　要：研究了基于氮杂冠醚为中性载体的阳离子选择性电极,该电极在pH为3.0的硝酸缓冲介质中对铝离子有近能斯特响应,其线性范围为8.0×10-5~1.0×10-1mol/L,检测限为4.0×10-5mol/L,斜率为20.0 mV/dec.,响应时间为20.0 s.该电极用于EDTA的电位滴定,结果令人满意.A novel poly （vinyl chloride） （PVC） membrane sensor for aluminum ions was prepared by employing 1,1, 6,6,11,11,16,16-eight methyls-21,22,23,24-four azacrown ether as a neutral carrier. The electrode exhibited a near Nernstian response over a wide concentration range from 8.0 × 10^-5 to 1.0 × 10^-1 mol/L and the detection limit of the sensor was 4.0×10^-5 mol/L in the pH range of 2.0--4.0. The sensor exhibited a Nernstian slope of 20, 0 mV per decade. The response time of the sensor was about 20, 0 s and it could be used over a period of 3 months without any divergence in potential. The proposed sensor showed good selectivity toward A1^3＋ over a wide variety of other alkali, alkaline earth, transition and heavy metal ions, The electrode has been used as an indicator electrode in potentiometric titration of A1^3＋ with EDTA.

关 键 词：铝离子电极 PVC膜 冠醚 

分 类 号：O657.15[理学—分析化学]