Large enhancement of sensitivity and a wider working range of glass pH electrode with amperometric and potentiometric responses

被引：10

作者：

Cheng, Changming ^{[1
]}

Tian, Xianqing ^{[2
]}

Guo, Yong ^{[2
]}

Li, Yi ^{[1
]}

Yuan, Hongyan ^{[1
]}

Xiao, Dan ^{[1
,2
]}

机构：

[1] Sichuan Univ, Coll Chem Engn, Chengdu 610065, Peoples R China

[2] Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610065, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 27期

基金：

中国国家自然科学基金;

关键词：

Electrochemistry; Sensor; Glass pH electrode; Non-equilibrium; Sensitivity; ION-SELECTIVE MEMBRANES; GALVANOSTATIC POLARIZATION; DETECTION LIMITS; ELECTROCHEMICAL SENSORS; PULSE VOLTAMMETRY; TRACE LEVELS; PULSTRODES; MECHANISM; MODEL;

D O I：

10.1016/j.electacta.2011.08.065

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this communication, a new four-electrode measurement system has been developed to improve the analytical performance of a glass pH electrode. The sensitivity of detection is greatly enhanced and the working range is widened. In this new configuration, the potentiometric response slope of the pH electrode, dE/dpH, could be as high as -669 mV in the pH range 4-10. Amperometric measurement could also be employed to monitor the pH of aqueous solution and the response sensitivity (dI/dpH) is similar to 67 nA. A two-signal (i.e., potential and current) synchronous detection technology has been exploited for pH monitoring. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：9883 / 9886

页数：4

共 49 条

[1] A SIMPLE AND INEXPENSIVE FUNCTION GENERATOR AND A 4-ELECTRODE CELL FOR CYCLIC VOLTAMMETRY [J].

ALBAHADILY, FN ;

MOTTOLA, HA .

JOURNAL OF CHEMICAL EDUCATION, 1986, 63 (03) :271-273

[2] Electrochemical sensors [J].

Bakker, E ;

Telting-Diaz, M .

ANALYTICAL CHEMISTRY, 2002, 74 (12) :2781-2800

[3] Potentiometry at trace levels [J].

Bakker, E ;

Pretsch, E .

TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2001, 20 (01) :11-19

[4] Modern Potentiometry [J].

Bakker, Eric ;

Pretsch, Ernoe .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2007, 46 (30) :5660-5668

[5] Electrochemical sensors [J].

Bakker, Eric ;

Qin, Yu .

ANALYTICAL CHEMISTRY, 2006, 78 (12) :3965-3983

[6] EIS study of potentiometric membranes selective to Ca2+ employing the new ionophoric antibiotic tetronasin [J].

Calvo, D ;

Bartrolí, J ;

del Valle, M .

ELECTROCHIMICA ACTA, 2006, 51 (8-9) :1569-1575

[7] Potentiometric biosensing of proteins with ultrasensitive ion-selective microelectrodes and nanoparticle labels [J].

Chumbimuni-Torres, Karin Y. ;

Dai, Zong ;

Rubinova, Nastassia ;

Xiang, Yun ;

Pretsch, Erno ;

Wang, Joseph ;

Bakker, Eric .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (42) :13676-13677

[8]

Cremer M, 1906, Z BIOL-MUNICH, V29, P562

[9] Polyion-sensitive membrane electrodes for detecting phosphate-rich biological polyanions [J].

Esson, JM ;

Meyerhoff, ME .

ELECTROANALYSIS, 1997, 9 (17) :1325-1330

[10] Study of the potentiometric response of the doped spinel Li1.05Al0.02Mn1.98O4 for the optimization of a selective lithium ion sensor [J].

Freitas, Bruno H. ;

Amaral, Fabio A. ;

Bocchi, Nerilso ;

Teixeira, Marcos F. S. .

ELECTROCHIMICA ACTA, 2010, 55 (20) :5659-5664

← 1 2 3 4 5 →