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Detection of cadmium sulphide nanoparticles by using screen-printed electrodes and a handheld device

机译:使用丝网印刷电极和手持设备检测硫化镉纳米颗粒

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摘要

A simple method based on screen-printed electrodes and a handheld potentiostatic device is reported for the detection of water soluble CdS quantum dots modified with glutathione. The detection method is based on the stripping of electrochemically reduced cadmium at pH 7.0 by using square wave voltammetry. Various parameters that affect the sensitivity of the method are optimized. QD suspension volumes of 20 mu l and a number of around 2 X 10~(11) CdS quantum dots have been able to be detected. The proposed method should be of special interest for bioanalytical assays, where CdS quantum dots can be used as electrochemical tracers.
机译:报道了一种基于丝网印刷电极和手持式恒电位仪的简单方法,用于检测用谷胱甘肽修饰的水溶性CdS量子点。该检测方法是基于使用方波伏安法剥离pH 7.0的电化学还原镉。优化了影响该方法灵敏度的各种参数。 QD悬浮液体积为20μl,并已检测到大约2 X 10〜(11)个CdS量子点。对于CdS量子点可以用作电化学示踪剂的生物分析测定,所提出的方法应该是特别有意义的。

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