Ultrasensitive and selective colorimetric detection of thiourea using silver nanoprobes
- 18 October 2011
- journal article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 136 (24), 5256-5260
- https://doi.org/10.1039/c1an15613f
Abstract
A novel colorimetric thiourea (TU) sensor was developed utilizing citrate modified silver nanoparticles (AgNPs). The introduction of TU reduced the overall surface charges of the AgNPs, resulting in aggregation of AgNPs and a colorimetric response correlating with the concentration of TU. The detection of TU could be realized within 2 min, with an ultralow detection limit of 0.8 nM by the absorption method. In addition, the AgNPs sensor also showed good selectivity in the presence of potential interfering compounds. Since common steps such as modification and separation could be successfully avoided, the sensor developed here could provide a simple, cost-effective yet rapid and sensitive measurement tool for TU detection, and may provide new opportunities in the development of sensors for food safety and environmental monitoring in the future.Keywords
This publication has 38 references indexed in Scilit:
- Determination of thiourea in fruit juice by a kinetic spectrophotometric methodJournal of Hazardous Materials, 2010
- A kinetic method for the determination of thiourea by its catalytic effect in micellar mediaSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2009
- Amperometric determination of thiourea in alkaline media on a copper oxide–copper electrodeJournal of Applied Electrochemistry, 2006
- Voltammetric Determination of Thiourea in Copper Refinery ElectrolytesJournal of Analytical Chemistry, 2005
- A study of reaction between quinones and thiourea: determination of thiourea in orange juiceJournal of Food Composition and Analysis, 2004
- Determination of low thiourea concentrations in industrial process water and natural samples using reversed-phase high-performance liquid chromatographyJournal of Chromatography A, 2001
- Fourier transform infrared spectrometric determination of thiourea in the presence of sulphur dioxide in aqueous solutionAnalytica Chimica Acta, 2001
- Chemiluminescence Determination of Thiourea Using Tris(2,2′-bipyridyl)ruthenium(II)–KMnO4 SystemAnalytical Sciences, 1999
- Quantitative determination of thiourea in aqueous solution in the presence of sulphur dioxide by Raman spectroscopyThe Analyst, 1986
- Determination of some thiourea-containing pesticides by pulse voltammetric methods of analysisAnalytical Chemistry, 1977