Fluorescence based fibre optic pH sensor for the pH 10-13 range suitable for corrosion monitoring in concrete structures

被引：132

作者：

Nguyen, T. Hien ^{[1
]}

Venugopala, Thillainathan ^{[1
]}

Chen, Shuying ^{[1
]}

Sun, Tong ^{[1
]}

Grattan, Kenneth T. V. ^{[1
]}

Taylor, Susan E. ^{[2
]}

Basheer, P. A. Muhammed ^{[2
]}

Long, Adrian E. ^{[2
]}

机构：

[1] City Univ London, Sch Engn & Math Sci, London EC1V 0HB, England

[2] Queens Univ Belfast, Sch Planning Architecture & Civil Engn, Belfast BT9 5AG, Antrim, North Ireland

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 191卷

基金：

英国工程与自然科学研究理事会;

关键词：

Optical fibre sensor; Fluorescent sensor; pH sensor; High pH values; Corrosion monitoring; Coumarin dye; EMBEDDABLE REFERENCE ELECTRODES; COUMARIN; MEMBRANES; SYSTEMS; LAYER; DYES;

D O I：

10.1016/j.snb.2013.09.072

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The design, development and evaluation of an optical fibre pH sensor for monitoring pH in the alkaline region are discussed in detail in this paper. The design of this specific pH sensor is based on the pH induced change in fluorescence intensity of a coumarin imidazole dye which is covalently attached to a polymer network and then fixed to the distal end of an optical fibre. The sensor provides a response over a pH range of 10.0-13.2 with an acceptable response rate of around 50 min, having shown a very good stability over a period of longer than 20 months thus far. The sensor has also demonstrated little cross-sensitivity to ionic strength (IS) and also excellent photostability through a series of laboratory tests. These features make this type of sensor potentially well suited for in situ long term monitoring of pH in concrete structures, to enhance structural monitoring in the civil engineering sector. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.

引用

页码：498 / 507

页数：10

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