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DC Field | Value | Language |
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dc.contributor.author | Apilux A. | |
dc.contributor.author | Dungchai W. | |
dc.contributor.author | Siangproh W. | |
dc.contributor.author | Praphairaksit N. | |
dc.contributor.author | Henry C.S. | |
dc.contributor.author | Chailapakul O. | |
dc.date.accessioned | 2021-04-05T03:36:46Z | - |
dc.date.available | 2021-04-05T03:36:46Z | - |
dc.date.issued | 2010 | |
dc.identifier.issn | 32700 | |
dc.identifier.other | 2-s2.0-77749302316 | |
dc.identifier.uri | https://ir.swu.ac.th/jspui/handle/123456789/14722 | - |
dc.identifier.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-77749302316&doi=10.1021%2fac9022555&partnerID=40&md5=963317afb202846b80edc680121baf5d | |
dc.description.abstract | A novel lab-on-paper device combining electrochemical and colorimetric detection for the rapid screening of Au(III) in the presence of a common interference, Fe(III), in industrial waste solutions is presented here. With dilute aqua regia (0.1 M HCl + 0.05 M HNO3) as the supporting electrolyte, square wave voltammetry on paper provided a well-defined reduction peak for Au(III) at ∼287 ± 12 mV vs Ag/AgCl. Under the optimized working conditions, the calibration curve showed good linearity in the concentration range of 1-200 ppm of Au(III) with a correlation coefficient of 0.997. The limit of detection (LOD) of the proposed method is 1 ppm. Interferences from various cations were also studied. Fe(III) is the only metal that affects the electrochemical determination of Au(III) when present above a 2.5-fold excess concentration of that of the Au(III). To overcome this limitation, a colorimetric method was used to simultaneously detect Fe(III) as a screening tool. The procedure was then successfully applied to determine Au(III) in gold-refining waste solutions. The results are in agreement with those obtained from inductively coupled plasma-atomic emission spectrometry (ICP-AES). © 2010 American Chemical Society. | |
dc.subject | Ag/AgCl | |
dc.subject | Aqua regia | |
dc.subject | Calibration curves | |
dc.subject | Colorimetric detection | |
dc.subject | Colorimetric methods | |
dc.subject | Concentration of | |
dc.subject | Concentration ranges | |
dc.subject | Correlation coefficient | |
dc.subject | Electrochemical determination | |
dc.subject | Inductively coupled plasma-atomic emission spectrometry | |
dc.subject | Limit of detection | |
dc.subject | Rapid screening | |
dc.subject | Reduction peak | |
dc.subject | Screening tool | |
dc.subject | Simultaneous determinations | |
dc.subject | Square wave voltammetry | |
dc.subject | Supporting electrolyte | |
dc.subject | Waste solution | |
dc.subject | Working conditions | |
dc.subject | Atomic emission spectroscopy | |
dc.subject | Color | |
dc.subject | Colorimetry | |
dc.subject | Curve fitting | |
dc.subject | Gold compounds | |
dc.subject | Inductively coupled plasma | |
dc.subject | Iron compounds | |
dc.subject | Metal refining | |
dc.subject | Chemical detection | |
dc.subject | gold | |
dc.subject | iron | |
dc.subject | article | |
dc.subject | colorimetry | |
dc.subject | electrochemistry | |
dc.subject | methodology | |
dc.subject | statistical parameters | |
dc.subject | Colorimetry | |
dc.subject | Electrochemistry | |
dc.subject | Gold | |
dc.subject | Iron | |
dc.subject | Limit of Detection | |
dc.title | Lab-on-paper with dual electrochemical/ colorimetric detection for simultaneous determination of gold and iron | |
dc.type | Article | |
dc.rights.holder | Scopus | |
dc.identifier.bibliograpycitation | Analytical Chemistry. Vol 82, No.5 (2010), p.1727-1732 | |
dc.identifier.doi | 10.1021/ac9022555 | |
Appears in Collections: | Scopus 1983-2021 |
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