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Spectrophotometric label-free determination of lead using thiol functionalized gold nanoparticles.

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Title Spectrophotometric label-free determination of lead using thiol functionalized gold nanoparticles.
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Creator Gahlaut, J.; Rajput, Y.S.; Meena, S.; Nanda, D.K. and Sharma, R.
 
Subject 4-methylthio-1-butanolgold nanoparticlelead assayspectrophotometrythiol compounds
 
Description Not Available
A method for the determination of lead is described using thiol-functionalized gold nanoparticle. The detection method is based on the prevention of thiol-induced aggregation of gold nanoparticles by lead. Among six thiols, e.g., 4-mercapto-1-butanol, meso-2, 3-dimercaptosuccinic acid, mercaptosuccinic acid, 6-mercapto-1-hexanol, 4-(methylthio)-1-butanol, 1-propanethiol, four (4-mercapto-1-butanol, 6-mercapto-1-hexanol, 4-(methylthio)-1-butanol and 1-propanethiol) induced the aggregation of the gold nanoparticles which was measured by the change in absorbance at 520 and 650 nm. Prior incubation of the gold nanoparticles with lead decreased the 4-(methylthio)-1-butanol-induced aggregation of gold nanoparticles in a dose-dependent manner. A linear inverse relationship between the logarithmic concentration of lead and the ratio of absorbance at 650 to 520 was noted. The method has a dynamic range from 10 nM to 100 µM. However, metals such as mercury and chromium were more effective in comparison with lead in preventing the 4-methylthio-1-butanol-induced aggregation of gold nanoparticles. The method can be used for assessing the heavy metal load in water samples.
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Date 2021-08-26T08:33:23Z
2021-08-26T08:33:23Z
2018-03-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/60768
 
Language English
 
Relation Not Available;
 
Publisher Not Available