Journal
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
Volume 9, Issue -, Pages 1414-1422Publisher
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.9.134
Keywords
absorbance; dispersion; drinking water; rapid detection; UV spectroscopy
Funding
- National Research Foundation South Korea [2017R1C1B-5017360]
- King Saud University [RG-1438-078]
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We developed a colorimetric method for the rapid detection of copper ions (Cu2+) in aqueous solution. The detection of Cu2+ is based on coordination reactions of Cu2+ with casein peptide-functionalized silver nanoparticles (AgNPs), leading to a distinct color change of the solution from yellow to red. The developed method has a good detection limit of about 0.16 mu M Cu2+ using 0.05 mL of AgNPs stock solution and a linearity in the range of 0.08-1.44 mu M Cu(2+ )with a correlation coefficient of R-2 = 0.973. The developed method is a useful tool for the detection of Cu2+ ions. Furthermore, it can be used for monitoring Cu2+ in water at concentrations below the safe limit for drinking water set by the World Health Organization.
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