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Title: | A simple paper-based approach for arsenic determination in water using hydride generation coupled with mercaptosuccinic-acid capped CdTe quantum dots |
Authors: | Thepmanee O. Prapainop K. Noppha O. Rattanawimanwong N. Siangproh W. Chailapakul O. Songsrirote K. |
Keywords: | Bottles Cadmium telluride Chemical detection Fluorescence Hydrides II-VI semiconductors Lead compounds Nanocrystals Paper Arsenic determination Fluorescent detection Fluorescent emission Fluorescent quenching Hydride generation techniques Hydride generations Limit of quantitations Mercaptosuccinic acids Semiconductor quantum dots |
Issue Date: | 2020 |
Abstract: | This research aims to develop a simple paper-based device for arsenic detection in water samples where a hydride generation technique coupled with mercaptosuccinic acid-capped CdTe quantum dots (MSA-CdTe QDs) as a detection probe was applied to the detection system. MSA-CdTe QDs were coated on a paper strip, inserted into the cover cap of a reaction bottle, to react with the developed arsine gas. Fluorescent emission of the QDs was quenched upon the presence of arsenic in solutions, whereby only a small amount of the MSA-CdTe QDs was required. The excitation and emission wavelengths for fluorescent detection were 278.5 nm and 548.5 nm, respectively. The proposed system provided a limit of detection of 0.016 mg L-1 and a limit of quantitation of 0.053 mg L-1, and a detection range of 0.05-30.00 mg L-1. In addition, the tolerance level of the detection approach to interference by other vapor-generated species was successfully improved by placing another paper strip coated with a solution of saturated lead acetate in front of the detection paper strip. This developed approach offered a simple and fast, yet accurate and selective detection of arsenic contaminated in water samples. In addition, the mechanism of fluorescent quenching was also proposed. © 2020 The Royal Society of Chemistry. |
URI: | https://ir.swu.ac.th/jspui/handle/123456789/11914 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091053585&doi=10.1039%2fd0ay00273a&partnerID=40&md5=f81fb4ea6fce2dbafedd131ac3ce30bf |
ISSN: | 17599660 |
Appears in Collections: | Scopus 1983-2021 |
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