期刊
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
卷 95, 期 -, 页码 69-85出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.trac.2017.07.012
关键词
Selenium; Voltammetry; Modified electrodes; Optical techniques; Water
资金
- DST-INSPIRE - Department of Science and Technology, New Delhi [GAP 353]
Selenium, a metalloid, commonly known for its essentiality has emerged out as a water pollutant of concern for environmentalist due to its presence in natural water resources above the permissible limit. The high level of selenium in the environment poses severe health and ecosystem threats, therefore, its monitoring in water is of paramount concern. The present contribution summarizes and critically analyzes the field promising techniques, in particular, voltammetry and optical approach, for selenium quantification in water. The role of sensor material (organic fluorophores, colorimetric dyes and quantum dots), electrode surface modifiers (Hg, Bi, polymers, nanomaterials, etc.), chelators, etc., to overcome various challenges and achieve better sensor performance in terms of detection limit, range, reproducibility, stability, selectivity, sensitivity, and so forth are critically discussed. To end with, the possible future developments are discussed towards the realization of a cost-effective & field deployable monitoring device for on-site selenium analysis. (C) 2017 Elsevier B.V. All rights reserved.
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