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Colorimetric detection of Mn2+ using silver nanoparticles cofunctionalized with 4-mercaptobenzoic acid and melamine as a probe.
- Source :
-
Talanta [Talanta] 2012 Aug 15; Vol. 97, pp. 331-5. Date of Electronic Publication: 2012 May 11. - Publication Year :
- 2012
-
Abstract
- A facile, selective and highly sensitive method is proposed for colorimetric detection of manganese ions using 4-mercaptobenzoic acid (4-MBA) and melamine (MA) modified silver nanoparticles (AgNPs). The presence of Mn(2+) induces the aggregation of AgNPs through cooperative metal-ligand interaction, resulting in a color change from bright yellow to purple. The cofunctionalized AgNPs showed obvious advantages over the ones functionalized only by 4-MBA or MA in terms of selectivity. Mn(2+) could be monitored by colorimetric response of AgNPs by a UV-vis spectrophotometer or even naked eyes. The absorbance ratio (A(550 nm)/A(408 nm)) is linear with the concentration of Mn(2+) ranging from 5×10(-7) mol/L to 1×10(-5) mol/L with a correlation coefficient of 0.993, and the detection limit is as low as 5×10(-8) mol/L. Particularly, this cost-effective process also allowed rapid and simple determination of the Mn(2+) in drinking water.<br /> (Copyright © 2012 Elsevier B.V. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1873-3573
- Volume :
- 97
- Database :
- MEDLINE
- Journal :
- Talanta
- Publication Type :
- Academic Journal
- Accession number :
- 22841088
- Full Text :
- https://doi.org/10.1016/j.talanta.2012.04.041