Protoporphyrin IX dimethyl ester as active material in PVC matrix membranes for the fabrication of zinc(II) selective sensor

被引：45
作者：
Gupta, VK [1 ]
Kumar, A [1 ]
Mangla, R [1 ]
机构：
[1] Univ Roorkee, Dept Chem, Roorkee 247667, Uttar Pradesh, India
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2001年 / 76卷 / 1-3期
关键词：
Zn2+-selective electrodes; sensors; potentiometric sensors;
D O I：
10.1016/S0925-4005(01)00656-6
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
PVC based membrane containing dimethyl-8,13-divinyl-3,7,12,17-tetramethyl-21H, 23H-porphine-2,18-dipropionate (Protoporphyrin IX dimethyl ester (I)) as active material along with sodium tetraphenyl berate (NaTPB) as anion excluder, and dioctyl phthalate (DOP) as solvent mediator in the ratio 15:100:2:200 (w/w) (I:DOP:NaTPB:PVC) exhibited a working concentration range of 1.5 x 10(-5) to 1.0 x 10(-1) M, with the slope of 29.0 +/- 1.0 mV/decade of activity and a fast response time (10 s). The working pH range of the sensor is 2.1-4.0 and it could be successfully used in partially non-aqueous medium (up to 40% v/v). The sensor has a life time of more than 5 months. It exhibits good selectivity over a number of cations and has been used as an indicator electrode for the end point determination in the potentiometric titration of Zn2+ against EDTA. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：617 / 623
页数：7
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