Lifetime-based fiber-optic water sensor using a luminescent complex in a lithium-treated Nafion™ membrane

被引：60

作者：

Glenn, SJ ^{[1
]}

Cullum, BM ^{[1
]}

Nair, RB ^{[1
]}

Nivens, DA ^{[1
]}

Murphy, CJ ^{[1
]}

Angel, SM ^{[1
]}

机构：

[1] Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA

来源：

ANALYTICA CHIMICA ACTA | 2001年 / 448卷 / 1-2期

关键词：

relative humidity; moisture; water content; Nafion (TM); lithium treatment; luminescence lifetime; optical fiber sensor;

D O I：

10.1016/S0003-2670(01)01295-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A lifetime-based fiber-optic sensor that can be used to measure water content in organic solvents and relative humidity of air is described. The sensor is based on the luminescence lifetime quenching of ruthenium(II)bisphenanthrolinedipyridophenazine (Rudppz) immobilized in a Nafion (TM) membrane that is mechanically attached to the distal tip of an optical fiber. Treatment of the Nation (TM) membrane with lithium hydroxide prior to doping with Rudppz provides a stable sensor response with intense, long-lived luminescence. The response of the sensor to relative humidity was characterized using dry air, room air, and water saturated air. The sensor is useful for measuring the water content of organic solvents below 4% (v/v) and the detection limit is determined to be 0.06, 0.07, and 0.006% (v/v) in DMSO, ethanol, and acetonitrile, respectively. It is being developed for the purpose of measuring water concentration gradients across Naflon (TM) membranes. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 8

页数：8

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