Fluorometric Determination of Zinc, Cadmium and Gallium Ions with a Fiber-Optic Sensor Having a Pyridoxal Isomer-Modified Chitosan/ Agarose Gel as a Sensing Probe
Fluorometric Determination of Zinc, Cadmium and Gallium Ions with a Fiber-Optic Sensor Having a Pyridoxal Isomer-Modified Chitosan/ Agarose Gel as a Sensing Probe
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使用以吡哆醛异构体改性壳聚糖/琼脂糖凝胶作为传感探针的光纤传感器荧光测定锌、镉和镓离子
DOI：
10.2116/analsci.8.837
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
K. Ohga
中科院分区：
文献类型：
--
作者：
Y. Kurauchi;R. Hayashi;N. Egashira;K. Ohga
研制了一种用于Zn^2+、Cd^2+和Ga^3+离子的分叉光纤传感器。以5-甲酰基-3-羟基-4-羟甲基-2-甲基吡啶修饰的壳聚糖作为荧光探针，将其固定在琼脂糖凝胶上。在浓度为5.0×10^-5 M（1 M=1 mol dm^-3）时，连续8次测量对Zn^2+的响应的重现性在5%以内。Zn^2+浓度在0 ~ 2.0 × 10 ^-5 M范围内呈线性关系，相关系数为0.994，检出限为1.0×10^-6 M（S/N=3）。Cd^2+和Ga^3+离子也被检测到，尽管灵敏度略低于Zn^2+。
A bifurcated fiber-optic sensor for Zn^2+, Cd^2+ and Ga^3+ ions was fabricated. Chitosan modified with 5-formyl-3-hydroxy-4-hydroxymethyl-2-methylpyridine was immobilized on an agarose gel and used as a fluorogenic probe. The reproducibility of the response to Zn^2+ was within 5% in eight successive measurements at 5.0×10^-5 M (1 M=1 mol dm^-3). A linear relationship with a correlation coefficient of 0.994 was obtained in the Zn^2+ concentration range of 0 -2.0×10^-5 M, and the detection limit was 1.0×10^-6 M (S/N=3). Cd^2+ and Ga^3+ ions were also detected, though with sensitivities somewhat lower than that for Zn^2+.