Indirect determination of free chlorine in seawater by cyclic voltammetry using graphite–epoxy composite electrode: Hydrogen adsorption capacity of graphite–epoxy composite is one–third of that of platinum
A new possibility of indirect determination of free chlorine using a graphite–epoxy composite(GEC) electrode instead of Pt disk electrode was suggested by interpreting the relationship between the peak current of the oxidation peak for hydrogen generated through water electrolysis in CV and the amou...
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Elsevier
2024-12-01
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| Series: | Sensing and Bio-Sensing Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221418042400093X |
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| author | Kye Hak Ko |
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| author_sort | Kye Hak Ko |
| collection | DOAJ |
| description | A new possibility of indirect determination of free chlorine using a graphite–epoxy composite(GEC) electrode instead of Pt disk electrode was suggested by interpreting the relationship between the peak current of the oxidation peak for hydrogen generated through water electrolysis in CV and the amount of the free chlorine. The linear response range of concentration was 0.06–0.2 mg∙L−1 with correlation coefficient of 0.9951 (n = 5) and the sensitivity of 1225 μA cm−2 mg−1 L. The limit of detection (LOD) calculated from the 3σ IUPAC criteria was 1.2 × 10−2 mg L−1. The relative standard deviation (RSD) to 0.06 mg L−1 was 4.65 %(n = 10). The results show that the amount of free chlorine in the disinfected seawater can be indirectly determined by using a GEC electrode without influence of interferences unlike a Pt disk electrode. On the other hand, in this paper, a new method is proposed to evaluate the relative hydrogen adsorption capacity by the sensitivity of GEC electrode compared with that of Pt disk electrode. During the investigation of the hydrogen adsorption on the surface of the working electrode, we obtained the result that the hydrogen adsorption capacity of GEC is one-third of that of platinum. |
| format | Article |
| id | doaj-art-b7d7eacd1634427db140fa4c0a948aaa |
| institution | OA Journals |
| issn | 2214-1804 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Sensing and Bio-Sensing Research |
| spelling | doaj-art-b7d7eacd1634427db140fa4c0a948aaa2025-08-20T02:30:39ZengElsevierSensing and Bio-Sensing Research2214-18042024-12-014610071110.1016/j.sbsr.2024.100711Indirect determination of free chlorine in seawater by cyclic voltammetry using graphite–epoxy composite electrode: Hydrogen adsorption capacity of graphite–epoxy composite is one–third of that of platinumKye Hak Ko0Laboratory of Analytical Chemistry, Faculty of Chemical Engineering, Kim Chaek University of Technology, Pyongyang, Republic of KoreaA new possibility of indirect determination of free chlorine using a graphite–epoxy composite(GEC) electrode instead of Pt disk electrode was suggested by interpreting the relationship between the peak current of the oxidation peak for hydrogen generated through water electrolysis in CV and the amount of the free chlorine. The linear response range of concentration was 0.06–0.2 mg∙L−1 with correlation coefficient of 0.9951 (n = 5) and the sensitivity of 1225 μA cm−2 mg−1 L. The limit of detection (LOD) calculated from the 3σ IUPAC criteria was 1.2 × 10−2 mg L−1. The relative standard deviation (RSD) to 0.06 mg L−1 was 4.65 %(n = 10). The results show that the amount of free chlorine in the disinfected seawater can be indirectly determined by using a GEC electrode without influence of interferences unlike a Pt disk electrode. On the other hand, in this paper, a new method is proposed to evaluate the relative hydrogen adsorption capacity by the sensitivity of GEC electrode compared with that of Pt disk electrode. During the investigation of the hydrogen adsorption on the surface of the working electrode, we obtained the result that the hydrogen adsorption capacity of GEC is one-third of that of platinum.http://www.sciencedirect.com/science/article/pii/S221418042400093XFree chlorineSeawater disinfectionGraphite–epoxy composite (GEC) electrodeCyclic voltammetry (CV)Hydrogen adsorption capacity |
| spellingShingle | Kye Hak Ko Indirect determination of free chlorine in seawater by cyclic voltammetry using graphite–epoxy composite electrode: Hydrogen adsorption capacity of graphite–epoxy composite is one–third of that of platinum Sensing and Bio-Sensing Research Free chlorine Seawater disinfection Graphite–epoxy composite (GEC) electrode Cyclic voltammetry (CV) Hydrogen adsorption capacity |
| title | Indirect determination of free chlorine in seawater by cyclic voltammetry using graphite–epoxy composite electrode: Hydrogen adsorption capacity of graphite–epoxy composite is one–third of that of platinum |
| title_full | Indirect determination of free chlorine in seawater by cyclic voltammetry using graphite–epoxy composite electrode: Hydrogen adsorption capacity of graphite–epoxy composite is one–third of that of platinum |
| title_fullStr | Indirect determination of free chlorine in seawater by cyclic voltammetry using graphite–epoxy composite electrode: Hydrogen adsorption capacity of graphite–epoxy composite is one–third of that of platinum |
| title_full_unstemmed | Indirect determination of free chlorine in seawater by cyclic voltammetry using graphite–epoxy composite electrode: Hydrogen adsorption capacity of graphite–epoxy composite is one–third of that of platinum |
| title_short | Indirect determination of free chlorine in seawater by cyclic voltammetry using graphite–epoxy composite electrode: Hydrogen adsorption capacity of graphite–epoxy composite is one–third of that of platinum |
| title_sort | indirect determination of free chlorine in seawater by cyclic voltammetry using graphite epoxy composite electrode hydrogen adsorption capacity of graphite epoxy composite is one third of that of platinum |
| topic | Free chlorine Seawater disinfection Graphite–epoxy composite (GEC) electrode Cyclic voltammetry (CV) Hydrogen adsorption capacity |
| url | http://www.sciencedirect.com/science/article/pii/S221418042400093X |
| work_keys_str_mv | AT kyehakko indirectdeterminationoffreechlorineinseawaterbycyclicvoltammetryusinggraphiteepoxycompositeelectrodehydrogenadsorptioncapacityofgraphiteepoxycompositeisonethirdofthatofplatinum |