期刊
TALANTA
卷 153, 期 -, 页码 197-202出版社
ELSEVIER
DOI: 10.1016/j.talanta.2016.03.028
关键词
Arsenic; Silver nanoplates; Colorimetry; Ferrihydrite-coated silica gel; Optical detection
资金
- Srinakharinwirot University, Thailand [044/2557]
- Thailand Research Fund through Research Team Promotion Grant [RTA5780005]
The optical detection for inorganic arsenic (As) semi-quantitative determination is presented by using silver nanoplates (AgNPIs). The color of AgNPs is immediately changed in the presence of As(III) and As (V) with the same sensitivity. To improve the selectivity of AgNPIs for As detection, ferrihydrite-coated silica gel (SiO2-Fh) was specifically exploited as adsorbent for arsenic prior to As detection by AgNPIs. The developed method provides the detection limit of 0.5 ppm with the detection range between 0.5 ppm and 30.0 ppm for As determination observed with naked eye, and allows to determine total inorganic arsenic. This is the first report of As detection approach combining As removal technology together with nanotechnology. This combined technique provides a rapid, sensitive and selective method for monitoring As levels in aqueous samples, and can be employed as a testing field kit to screen arsenic contamination outside of a laboratory. (C) 2016 Elsevier B.V. All rights reserved.
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