Ytterbium(III)-selective membrane electrode based on cefixime

被引：96
作者：
Ganjali, MR [1 ]
Naji, L
Poursaberi, T
Shamsipur, M
Haghgoo, S
机构：
[1] Univ Tehran, Dept Chem, Tehran, Iran
[2] Tarbiat Modares Univ, Dept Chem, Tehran, Iran
[3] Razi Univ, Dept Chem, Khorramshahr, Iran
[4] Ctr Qual Control Drugs, Tehran, Iran
来源：
ANALYTICA CHIMICA ACTA | 2003年 / 475卷 / 1-2期
关键词：
Ytterbium ion-selective electrode; PVC membrane; cefixime; potentiometry;
D O I：
10.1016/S0003-2670(02)01226-6
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We have discovered that the antibiotic cefixime (CFI) can be used as a suitable ionophore in PVC membranes having interesting response characteristics for Yb3+ ions. The selective complexation behavior of cefixime with Yb3+ over different metal ions was studied in DMSO solution. The negligible water solubility of cefixime and the increased stability and selectivity of its Yb3+ complex make the antibiotic an attractive ionophore for use in potentiometric poly (vinyl chloride) membrane electrodes for Yb3+. The results revealed a Nemstian response to Yb3+ over concentration range 1.0 x 10(-2)-1.0 x 10(-6) M as well as improved selectivity against a wide range of common interferences. The sensor possesses a detection limit of 7.0 x 10(-7) M and can be used in a pH range 3.0-8.0 for at least 8 weeks. (C) 2002 Published by Elsevier Science B.V.
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收藏
页码：59 / 66
页数：8
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