Speciation of iron(II), iron(III) and full-range pH monitoring using paptode: A simple colorimetric method as an appropriate alternative for optodes

被引：85

作者：

Abbaspour, A ^{[1
]}

Mehrgardi, MA ^{[1
]}

Noori, A ^{[1
]}

Kamyabi, MA ^{[1
]}

Khalafi-Nezhad, A ^{[1
]}

Rad, MNS ^{[1
]}

机构：

[1] Shiraz Univ, Dept Chem, Coll Sci, Shiraz 71454, Iran

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2006年 / 113卷 / 02期

关键词：

paptode; CCD camera; scanner; 1,10-phenanthroline; 4-methyl-2,6-bis(hydroxylmethyl)phenol; Fe;

D O I：

10.1016/j.snb.2005.03.119

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new methodology for construction of a sensor array, to acquire signal patterns, is discussed in this article. This sensor is constructed by immobilizing an ionophore on a piece of paper (or porous material such as thin layer chromatography (TLC) plate) followed by charge coupled device (CCD) camera-based detection. This allows us to use non-transparent porous materials as a support for immobilization of ionophore. Changes in RGB values of color spots on pH paper or TLC strips create a pattern. The obtained pattern was analyzed using Microsoft Excel Solver. Full-range pp monitoring and speciation of ferric and ferrous ions in solution are discussed. A commercial multi-color pH strip was used as a typical prototype for full-range pH monitoring, and 4-methyl-2,6-bis (hydroxymethyl)phenol (or its halo-derivatives) and 1, 10-phenanthroline were used as ionophores for determination of Fe(Ill) and Fe(H), respectively. Results of analyzed patterns showed a good correlation between predicted and true values of pH (r = 0.9986), Fe(II) (r = 0.9989) and Fe(III) (r = 0.9978) with acceptable relative standard error. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：857 / 865

页数：9

共 48 条

[1] Charge-transfer complexometric study of ferric ion with 4-chloro-2,6-bis(hydroxymethyl)phenol in a methanol-water system using spectrophotometric and potentiometric methods [J].