Determination of mercury(II) ions in aqueous solution using silver nanorods as a probe
Analytical Methods, ISSN: 1759-9679, Vol: 8, Issue: 18, Page: 3756-3762
2016
- 11Citations
- 11Captures
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Article Description
We report here the selective and sensitive determination of Hg in aqueous solution using the aggregation and re-aggregation of silver nanorods (SNRs) in the presence of dithiothreitol (DTT). The SNRs covalently bound with the thiol groups at the ends of the DTT molecule, leading to the aggregation of the SNRs. However, the aggregation of the SNRs was prevented by the addition of Hg. The thiol group of DTT has a strong binding affinity with Hg that helps to prevent the aggregation of SNRs. UV-visible spectrophotometry and transmission electron microscopy confirmed the aggregation and re-aggregation of SNRs with DTT and Hg. The absorption ratio (A/A) of the SNRs at λ nm decreased after reaction with DTT and increased with the addition of Hg. The changes in the absorption ratio of the SNRs at λ was directly proportional to the concentration of Hg in the range 1-100 pM. The developed method had good linearity (y = 0.001x + 0.899; R = 0.968) under the optimized conditions with a limit of detection of 0.15 pM. The method was validated in real samples such as tap and lake water and could be used for the environmental sensing of Hg.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84973621925&origin=inward; http://dx.doi.org/10.1039/c6ay00882h; http://xlink.rsc.org/?DOI=C6AY00882H; http://pubs.rsc.org/en/content/articlepdf/2016/AY/C6AY00882H; https://xlink.rsc.org/?DOI=C6AY00882H; https://dx.doi.org/10.1039/c6ay00882h; https://pubs.rsc.org/en/content/articlelanding/2016/ay/c6ay00882h
Royal Society of Chemistry (RSC)
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