Journal
MICROCHIMICA ACTA
Volume 184, Issue 10, Pages 3961-3967Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-017-2427-5
Keywords
Colorimetry; Gold nanorod; Determination of mercury(II); 6-Mercaptopurine induced aggregation; Mercury(II) ion inhibited aggregation; Absorption ratio; Water analysis
Categories
Funding
- National Natural Science Foundation of China [61505049, 21404033, 21401046]
- Doctoral Fund of Henan Polytechnic University [B2013-044, B2013-013]
- Research Projects of Science and Technology of the Education Department Henan Province [14B430026]
Ask authors/readers for more resources
The authors describe an optical assay for determination of mercury(II) ion by making use of gold nanorods (AuNRs) which are found to aggregate after addition of 6-mercaptopurine (6-MP) by forming a covalent Au-S bond. Aggregation is accompanied by a color change to blue. However, the 6-MP induced aggregation is inhibited in the presence of Hg(II) results because of the formation of a more stable Hg-S bond. The different degrees of aggregation of the AuNRs is indicated by variations in the absorption spectra and accompanied by a color change from blue to brown. Under the optimal conditions, the ratio of absorbances at 780 and 665 nm varies in the 1-100 nM Hg(II) concentration range. The effect can also be detected with bare eyes. The limit of detection is 0.48 nM. The method is rapid, sensitive, and does not require sophisticated instrumentation. It was successfully applied to the determination of Hg(II) in spiked water samples.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available