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Citation: HE Xiao-Yun, WANG Ji-Kui, HONG Yin, LYU Dan-Dan, YANG Xiao-Lu, LIU Chang, LU Xiao-Hua, CHEN Guo-Song. A flow System for Detection of Cadmium Based on 3D-Printed Thin-layer Cell and Flow-field Shaped Electrode[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(1): 7-13. doi: 10.11895/j.issn.0253-3820.160288 shu

A flow System for Detection of Cadmium Based on 3D-Printed Thin-layer Cell and Flow-field Shaped Electrode

1.
College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, China;
2.
College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China

Received Date: 13 April 2016
Revised Date: 26 July 2016

Fund Project: The work was supported by the National Basic Research Program of China (No.2013CB733504)

The concept of flow-field shaped (FFS) electrode was firstly put forward and the FFS three-electrode system was built. Combined with the 3D-printed thin-layer flow cell (TLFC), the flowing electrochemical detection system for detection of Cd by square wave stripping voltammetry (SWSV) was thus constructed. Several factors affecting the determination were investigated, including the shape of the electrode, measuring method, buffer medium, flow rate and deposition time. This detection system exhibited attractive properties, such as high sensitivity, good reproducibility and stability. Under optimized conditions, Cd concentration presented a good linear relationship with the stripping current in a range of 2-100 μg/L. The correlation coefficient was 0.997 and the detection limit was 0.5 μg/L. The proposed system was applied to determine trace Cd in environmental water and biological methane fermentation liquor. The detection results were consistent with the results obtained by ICP-AES and the recovery was 90%-106%.
- Cadmium,
- 3D-Printed thin-layer cell,
- Flow-field shaped electrode,
- Flowing electrochemical detection system
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