Analysis of arsenic speciation in drinking water by capillary electrophoresis

Name: Khajadpai Thipyapong

Organization : Burapha University. Faculty of Science

Name: Somsak Sirichai

Organization : Burapha University. Faculty of Science

Email : sirichai@go.buu.ac.th

ThaSH: Drinking water -- Arsenic content -- Analysis

ThaSH: Chemical detectors

ThaSH: Capillary electrophoresis

Abstract: Analysis of arsenic speciation by capillary electrophoresis was developed. The different arsenic species including Arsenite (As(III)), arsenate (As(V)), Methylarsonate (MMA), and Dimethylarsinate (DMA) were studied. To detect trace arsenic in drinking water by photometric detection method, stacking technique, large-volume sample stacking with polarity switching and high sensitivity cell were investigated. It was found that the optimal conditions were 20 mM borate buffer, pH 9.6, injection time of 0.3 min in flush mode, and separation voltage of 20 kV. Detection limits for Arsenite, Dimethylarsinate, Methylarsonate, and arsenate were 9.5, 20.6, 42.0, and 85.0 mu g L-1, respectively. Analysis could be achieved within 15 min. Coefficient of correlation values of calibration curves were more than 0.996. Percent recoveries of the analytes were between 91 and 110.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2020

Modified: 2023-12-08

Issued: 2023-12-08

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BibliograpyCitation : In the Chemical Society of Thailand under the Patronage of Professor Dr. HRH Princess Chulabhorn in association, Thammasat University Faculty of Science and Technology. The Pure and Applied Chemistry International Conference 2020 (PACCON 2020) (AC180-184). Bangkok : Thammasat University

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