Glassy carbon electrode modified with ex-in-situ gold film – A simple and effective working electrode for As(III) determination by using differential pulse anodic stripping voltammetry
Từ khóa
DOI:
https://doi.org/10.26459/hueunijns.v130i1D.6459Tóm tắt
An easy-to-make new working electrode, an ex-in-situ AuF/GCE, was developed for trace As(III) detection. A gold film electrode prepared ex-situ was re-plated in-situ during each arsenic deposition step by adding Au(III) into the analyte solution. The factors affecting arsenic stripping response, namely, gold film preparation conditions, electrolyte concentration, electrode cleaning potential, cleaning time, deposition potential, and deposition time, were investigated. Compared with the traditional gold film electrodes prepared ex-situ, the new electrode has better precision and linearity of arsenic differential pulse anodic stripping voltammetry responses. For a deposition time of 90 s at –200 mV, the new electrode exhibits a sensitivity, a limit of detection (3-Sigma), a limit of quantitation of 0.103 μA·L·μg–1, 0.4 μg·L–1, and 1.3 μg·L–1, respectively.Lượt tải
Tài liệu tham khảo
1. Ng J, Gomez-Caminero A, Howe P, Hughes M, Kenyon E, Lewis D, et al. Environmental Health Criteria 224: Arsenic and Arsenic Compounds. 2nd ed. Geneva: World Health Organization;2001.
2. World Health Organization. Guidelines for drinking-water quality: fourth edition incorporating first addendum. 4th ed. Geneva: World Health Organization;2017.
3. Stanković A, Kajinić Ž, Turkalj JV, Romić Ž, Sikirić MD, Asserghine A, et al. Voltammetric Determination of Arsenic with Modified Glassy Carbon Electrode. Electroanalysis. 2020;32(5):1043-51. DOI: https://doi.org/10.1002/elan.201900666
4. Yamada D, Ivandini TA, Komatsu M, Fujishima A, Einaga Y. Anodic stripping voltammetry of inorganic species of As3+ and As5+ at gold-modified boron-doped diamond electrodes. Journal of Electroanalytical Chemistry. 2008;615(2):145-53. DOI: https://doi.org/10.1016/j.jelechem.2007.12.004
5. Hung DQ, Nekrassova O, Compton RG. Analytical methods for inorganic arsenic in water: a review. Talanta. 2004;64(2):269-77. DOI: https://doi.org/10.1016/j.talanta.2004.01.027
6. Cavicchioli A, La-Scalea M, Gutz I. Analysis and Speciation of Traces of Arsenic in Environmental, Food and Industrial Samples by Voltammetry: a Review. Electroanalysis. 2004;16:697-711. DOI: https://doi.org/10.1002/elan.200302936
7. Sun YC, Mierzwa J, Yang MH. New method of gold-film electrode preparation for anodic stripping voltammetric determination of arsenic (III and V) in seawater. Talanta. 1997;44(8):1379-87. DOI: https://doi.org/10.1016/s0039-9140(96)02197-2
8. Wang J, Greene B. Characteristics of a flow cell for the determination of arsenic(III) by stripping voltammetry. Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. 1983;154(1):261-8. DOI: https://doi.org/10.1016/S0022-0728(83)80546-4
9. Bu L, Xie Q, Ming H. Gold nanoparticles decorated three-dimensional porous graphitic carbon nitrides for sensitive anodic stripping voltammetric analysis of trace arsenic(III). Journal of Alloys and Compounds. 2020;823:153723. DOI: https://doi.org/10.1016/j.jallcom.2020.153723
10. Bodewig FG, Valenta P, Nürnberg HW. Trace determination of As(III) and As(V) in natural waters by differential pulse anodic stripping voltammetry. Fresenius' Zeitschrift für analytische Chemie. 1982;311(3):187-91. DOI: https://doi.org/10.1007/BF00476644
11. Horwitz W, Albert R. The concept of uncertainty as applied to chemical measurements. Analyst. 1997;122(6):615-7. DOI: https://doi.org/10.1039/a703178e
