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Faradaic and capacitive current estimation by means of Independent Components Analysis and 1kHz sampling
Talanta ( IF 5.6 ) Pub Date : 2017-04-08 09:13:02
Filip Ciepiela, Małgorzata Jakubowska
Talanta ( IF 5.6 ) Pub Date : 2017-04-08 09:13:02
Filip Ciepiela, Małgorzata Jakubowska
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In this work it was demonstrated for the first time that Independent Components Analysis non-deterministic multivariate strategy enables estimation of the Faradic and double layer charging current components in differential pulse and anodic stripping voltammetry. The signals separation can be realized based on the different shapes of the capacitive and Faradaic current functions. The set of calibration voltammograms measured with the 1kHz sampling frequency is the sufficient data to retrieve signals compatible with the theoretical shapes, with r 2 greater than 0.987 for Faradaic component and greater than 0.994 for capacitive component. In the effect, DP voltammograms of Pb(II) and Cd(II) recorded on silver annular band electrode were constructed using only Faradaic component. Quantitative analysis was performed and calibration models were calculated by different waiting time and sampling time, what demonstrated the possibility of significant improvement of sensitivity in considered experiments.
中文翻译:
通过独立分量分析和1kHz采样估算法拉第电流和电容电流
在这项工作中,首次证明了独立成分分析的不确定性多元策略能够估计差分脉冲和阳极溶出伏安法中的法拉第和双层充电电流成分。可以基于电容和法拉第电流函数的不同形状来实现信号分离。用1kHz采样频率测量的一组校准伏安图是足够的数据,可检索与理论形状兼容的信号,其中r 2法拉第分量大于0.987,电容分量大于0.994。实际上,仅使用法拉第成分就可以构建记录在银环形带电极上的Pb(II)和Cd(II)的DP伏安图。进行了定量分析,并通过不同的等待时间和采样时间计算出校准模型,这证明了在考虑的实验中灵敏度显着提高的可能性。
更新日期:2017-04-09
中文翻译:
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通过独立分量分析和1kHz采样估算法拉第电流和电容电流
在这项工作中,首次证明了独立成分分析的不确定性多元策略能够估计差分脉冲和阳极溶出伏安法中的法拉第和双层充电电流成分。可以基于电容和法拉第电流函数的不同形状来实现信号分离。用1kHz采样频率测量的一组校准伏安图是足够的数据,可检索与理论形状兼容的信号,其中r 2法拉第分量大于0.987,电容分量大于0.994。实际上,仅使用法拉第成分就可以构建记录在银环形带电极上的Pb(II)和Cd(II)的DP伏安图。进行了定量分析,并通过不同的等待时间和采样时间计算出校准模型,这证明了在考虑的实验中灵敏度显着提高的可能性。