Investigating Arsenic Contents in Surface and Drinking Water by Voltammetry and the Method of Standard Additions

Cheng, Anran, Tyne, Rebecca, Kwok, Yu Ting, Rees, Louis, Craig, Lorraine, Lapinee, Chaipat, D'Arcy, Mitch, Weiss, Dominik J and Salaun, Pascal ORCID: 0000-0001-9525-3382 (2016) Investigating Arsenic Contents in Surface and Drinking Water by Voltammetry and the Method of Standard Additions. JOURNAL OF CHEMICAL EDUCATION, 93 (11). pp. 1945-1950.

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Official URL: http://dx.doi.org/10.1021/acs.jchemed.6b00025

Abstract

Testing water samples for arsenic contamination has become an important water quality issue worldwide. Arsenic usually occurs in very small concentrations, and a sensitive analytical method is needed. We present here a 1-day laboratory module developed to introduce Earth Sciences and/or Chemistry student undergraduates to key aspects of this topical issue. In this practical session, students were first introduced to the worldwide problems of arsenic contamination in groundwaters as a motivation of the experimental work. The latter consisted of quantification of arsenic levels in surface and drinking water at trace levels (nM, ppb) using the electroanalytical technique of anodic stripping voltammetry and the method of standard addition. Results were discussed with respect to water quality guidelines and geology. The complexity of data interpretation in this exercise can be tailored to a range of abilities and subject areas suited to the students and the course.

Item Type:	Article
Uncontrolled Keywords:	Second-Year Undergraduate, Analytical Chemistry, Interdisciplinary/Multidisciplinary, Hands-On Learning/Manipulative, Problems Solving/Decision Making, Quantitative Analysis, Instrumental Methods, Geochemistry, Laboratory Equipment/Apparatus
Depositing User:	Symplectic Admin
Date Deposited:	02 Dec 2016 11:12
Last Modified:	19 Jan 2023 07:24
DOI:	10.1021/acs.jchemed.6b00025
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3004732