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| Determination of Cr (VI) in Wastewater by Electrochemical Sensor Analysis Platform |
| Received:May 30, 2021 Revised:May 30, 2021 |
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| DOI：10.3969/j.issn.2095-1035.2021.05.003 |
| KeyWord:electrochemical detection; differential pulse stripping voltammetry; chromium(VI); ; heavy metal analysis |
| Author | Institution |
| panyuwei |
沈阳医学院 |
| yanmeng |
沈阳医学院 |
| zhouyongbing |
沈阳医学院 |
| wangjunxin |
沈阳医学院 |
| baixiudan |
沈阳医学院 |
| lidongyue |
沈阳医学院 |
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| Abstract: |
| A rapid, portable and sensitive electrochemical sensing platform has been successfully constructed for chromium(VI) determination in wastewater, combining with micro electrochemical system(μECS). The reduction peak of Cr (VI) was recorded by differential pulse cathodic stripping voltammetry(DPCSV) with three electrodes. We obtained a good linear responses of the peak current against the concentrations of Cr(VI) over the range of 2～500 μmol L-1 and the detection limit was 0.55 μmol L-1 (28.60 g L-1). The detection limit of Cr(VI) reached the guideline value set by World Health Organization (WHO) for Cr(VI) in groundwater (50 g L-1). The concentration of Cr(VI) in the chrome-plating industry sewage water was 2.03 mol L-1, which was consistent with the data using the spectroscopic analysis in national standard method. This method has good reproducibility and high sensitivity, so it has great potential in the field real-time monitoring of Cr (VI) in the environment. |
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