Spectroelectrochemical sensing based on multimode selectivity simultaneously achievable in a single device. 6. Sensing with a mediator

被引：40

作者：

DiVirgilio-Thomas, JM ^{[1
]}

Heineman, WR ^{[1
]}

Seliskar, CJ ^{[1
]}

机构：

[1] Univ Cincinnati, Dept Chem, Cincinnati, OH 45221 USA

来源：

ANALYTICAL CHEMISTRY | 2000年 / 72卷 / 15期

关键词：

D O I：

10.1021/ac991418m

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The use of a mediator to detect a nonabsorbing analyte during spectroelectrochemical modulation is demonstrated. The charge-selective composite film of Nafion-SiO2 was used to entrap the mediator, Ru(bipy)(3)(2+), The change in Delta A as detected by attenuated total reflection was then observed upon addition of the analyte, ascorbate. The effects of scan rate, concentration of mediator, him thickness, and analyte charge were studied to achieve optimal sensor conditions. The model sensor exhibited a linear range from 0.26 to 2.0 mM (R-2 = 0.998).

引用

页码：3461 / 3467

页数：7

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