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Studies on the Electrochemical Behavior of Thiazolidine and Its Applications Using a Flow–Through Chronoamperometric Sensor Based on a Gold Electrode

机译:噻唑烷的电化学行为及其在基于金电极的流通式计时安培传感器中的应用研究

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摘要

The electrochemical behaviors of thiazolidine (tetrahydrothiazole) on gold and platinum electrodes were investigated in a Britton-Robinson buffer (pH 2.77–11.61), acetate buffer (pH 4.31), phosphate buffer solutions (pH 2.11 and 6.38) and methanol or acetonitrile containing various supporting electrolytes. Detection was based on a gold wire electrochemical signal obtained with a supporting electrolyte containing 20% methanol-1.0 mM of phosphate buffer (pH 6.87, potassium dihydrogen phosphate and dipotassium hydrogen phosphate) as the mobile phase. Comparison with results obtained with a commercial amperometric detector shows good agreement. Using the chronoamperometric sensor with the current at a constant potential, and measurements with suitable experimental parameters, a linear concentration from 0.05 to 16 mg L−1 was found. The limit of quantification (LOQ) of the method for thiazolidine was found to be 1 ng.
机译:在Britton-Robinson缓冲液(pH 2.77-11.61),醋酸盐缓冲液(pH 4.31),磷酸盐缓冲液(pH 2.11和6.38)和甲醇或乙腈中研究了噻唑烷(四氢噻唑)在金和铂电极上的电化学行为支持电解质。检测基于金线电化学信号,该金线电化学信号是使用含20%甲醇-1.0 mM磷酸盐缓冲液(pH 6.87,磷酸二氢钾和磷酸氢二钾)的支持电解质作为流动相而获得的。与使用商业安培检测器获得的结果进行比较显示出很好的一致性。使用具有恒定电位的电流的计时电流传感器,并使用适当的实验参数进行测量,发现线性浓度为0.05至16 mg L -1 。噻唑烷方法的定量限(LOQ)为1 ng。

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