Molybdate sensor based on 5,10,15,20-tetraphenylporphyrinatocobalt complex in a PVC matrix

被引：36

作者：

Gupta, VK ^{[1
]}

Jain, AK ^{[1
]}

Singh, LP ^{[1
]}

Khurana, U ^{[1
]}

Kumar, P ^{[1
]}

机构：

[1] Univ Roorkee, Dept Chem, Roorkee 247667, Uttar Pradesh, India

来源：

ANALYTICA CHIMICA ACTA | 1999年 / 379卷 / 1-2期

关键词：

sensors; ion-selective electrode; molybdate-selective electrode;

D O I：

10.1016/S0003-2670(98)00629-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Poly(vinyl chloride) (PVC) based membranes of 5,10,15,20-tetraphenylporphyrinatocobalt (I), incorporating dibutyl phthalate (DBP) in the composition 9:55:36 (I:PVC:DBP) responds to molybdate (MoO42-) over the concentration range 7.6 x 10(-6) - 1.0 x 10(-1) mol l(-1), pH between 4.9 and 11.3, with a Nernstian slope and a fast response time of 15 s. The membrane shows excellent selectivity towards MoO42- ions over a number of other anions and exhibits stable response for more than four months. The sensor can be used in non-aqueous medium with no significant change in the value of slope or working concentration range for the estimation of MoO42- in solutions having upto 25% (v/v) non-aqueous fraction. It was applied for the estimation of molybdenum as molybdate in a sample of molybdenite, a low grade ore. (C) 1999 Elsevier Science B,V. All rights reserved.

引用

页码：201 / 208

页数：8

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