Please use this identifier to cite or link to this item: http://ir.swu.ac.th/jspui/handle/123456789/13711
Title: Highly selective and sensitive paper-based colorimetric sensor using thiosulfate catalytic etching of silver nanoplates for trace determination of copper ions
Authors: Chaiyo S.
Siangproh W.
Apilux A.
Chailapakul O.
Keywords: Cadmium
Cadmium compounds
Color
Colorimetry
Etching
Image processing
Inductively coupled plasma
Lead
Manganese
Mercury (metal)
Metal ions
Nanostructures
Optical data processing
Optical emission spectroscopy
Paper
Spectrometry
Trace analysis
Colorimetric detection
Colorimetric sensors
Copper ions
Inductively coupled plasma-optical emission spectrometry
Optimized conditions
Quantitative measurement
Silver nanoplates
Thiosulfate
Copper
aluminum
ammonia
arsenic
bismuth
cadmium
chromium
cobalt
copper ion
iron
lead
magnesium ion
manganese
mercury
nickel
potassium ion
silver nanoparticle
thiosulfate
zinc ion
copper
fresh water
ion
metal
metal nanoparticle
silver
thiosulfate
absorption
Article
catalysis
catalytic etching
colorimetric sensor
colorimetry
concentration response
controlled study
image processing
inductively coupled plasma optical emission spectrometry
limit of detection
limit of quantitation
particle size
pH
priority journal
quantitative analysis
scanning electron microscopy
sensor
spectrometry
surface plasmon resonance
transmission electron microscopy
analysis
beverage
catalysis
chemistry
food analysis
paper
ultraviolet spectrophotometry
Ammonia
Beverages
Catalysis
Colorimetry
Copper
Food Analysis
Fresh Water
Hydrogen-Ion Concentration
Ions
Limit of Detection
Metal Nanoparticles
Metals
Paper
Silver
Spectrophotometry, Ultraviolet
Thiosulfates
Issue Date: 2015
Abstract: A novel, highly selective and sensitive paper-based colorimetric sensor for trace determination of copper (Cu2+) ions was developed. The measurement is based on the catalytic etching of silver nanoplates (AgNPls) by thiosulfate (S2O32-). Upon the addition of Cu2+ to the ammonium buffer at pH 11, the absorption peak intensity of AuNPls/S2O32- at 522nm decreased and the pinkish violet AuNPls became clear in color as visible to the naked eye. This assay provides highly sensitive and selective detection of Cu2+ over other metal ions (K+, Cr3+, Cd2+, Zn2+, As3+, Mn2+, Co2+, Pb2+, Al3+, Ni2+, Fe3+, Mg2+, Hg2+ and Bi3+). A paper-based colorimetric sensor was then developed for the simple and rapid determination of Cu2+ using the catalytic etching of AgNPls. Under optimized conditions, the modified AgNPls coated at the test zone of the devices immediately changes in color in the presence of Cu2+. The limit of detection (LOD) was found to be 1.0ngmL-1 by visual detection. For semi-quantitative measurement with image processing, the method detected Cu2+ in the range of 0.5-200ngmL-1(R2=0.9974) with an LOD of 0.3ngmL-1. The proposed method was successfully applied to detect Cu2+ in the wide range of real samples including water, food, and blood. The results were in good agreement according to a paired t-test with results from inductively coupled plasma-optical emission spectrometry (ICP-OES). © 2015 Elsevier B.V.
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938855110&doi=10.1016%2fj.aca.2015.01.042&partnerID=40&md5=eb7e011db7f01c773b75cc6a1df68e57
http://ir.swu.ac.th/jspui/handle/123456789/13711
ISSN: 32670
Appears in Collections:Scopus 1983-2021

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