A FERROUS ION-OPTICAL SENSOR-BASED ON FLUORESCENCE QUENCHING

被引：22
|
作者：
NOIRE, MH
DUREAULT, B
机构：
[1] Commissariat à l'Energie Atomique, DCC/DRDD/SPHA/SPRA/GSIA, BP 6
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 1995年 / 29卷 / 1-3期
关键词：
OPTICAL SENSOR; FERROUS ION OPTICAL SENSOR; FLUORESCENCE QUENCHING;
D O I：
10.1016/0925-4005(95)01712-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A ferrous ion optical sensor is prepared by adsorbing Calcein Blue (CB) on a hydrophobic support incorporated in a flow cell. The sensor based on the fluorescence quenching of CB at pH = 2.2 is sensitive to ferrous ions over a wide range of analytical interest (1-500 mu M), with a linear and efficient quenching region at the lowest iron concentrations, from 10(-6) to 10(-5) hi. The time to reach steady-state fluorescence is very long and is governed by both slow complexation reaction and mass transfer. The immobilised reagent has been regenerated by addition of acidic chelating agents.
引用
收藏
页码：386 / 391
页数：6
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