Publication: Simple and selective paper-based colorimetric sensor for determination of chloride ion in environmental samples using label-free silver nanoprisms
2
0
Issued Date
2018
Resource Type
File Type
application/pdf
ISSN
399140
Other identifier(s)
2-s2.0-85029507390
Rights Holder(s)
Scopus
Bibliographic Citation
Talanta. Vol 178, (2018), p.134-140
Suggested Citation
Yakoh A., Rattanarat P., Siangproh W., Chailapakul O. Simple and selective paper-based colorimetric sensor for determination of chloride ion in environmental samples using label-free silver nanoprisms. Talanta. Vol 178, (2018), p.134-140. doi:10.1016/j.talanta.2017.09.013 Retrieved from: https://hdl.handle.net/20.500.14740/3712
Author(s)
Abstract
Simple and selective paper-based colorimetric sensors using silver nanoprism (AgNPrs) were conveniently fabricated and developed for the determination of chloride ions (Cl−) contaminated in the environment. Samples containing different concentrations of Cl− were analyzed. The analysis is based on the oxidative etching of the AgNPrs into smaller silver nanospheres (AgNPss) by Cl−. In the presence of Cl−, the distinctive color change of the AgNPrs from dark-violet to red was rapidly visualized by the naked eye in 5 min without the requirement of surface modification. For quantitative measurement using image processing, a good linear relationship (R2 = 0.996) between logarithmic of Cl− concentration and the average mean color intensity was obtained in the range of 10–1000 mg L−1 with a detection limit of 1.3 mg L−1. The developed sensors were investigated for precision, accuracy, and sensitivity and validated by the classical method. Statistical analysis proved that the developed sensors were precise, sensitive and accurate and can be used effectively for the analysis of Cl− in natural waters. © 2017 Elsevier B.V.