A highly selective colorimetric aqueous sensor for mercury |
| |
Authors: | Shunmugam Raja Gabriel Gregory J Smith Cartney E Aamer Khaled A Tew Gregory N |
| |
Affiliation: | Department of Polymer Science and Engineering, University of Massachusetts Institution, Amherst, MA 01003, USA. |
| |
Abstract: | A new colorimetric mercury sensor is reported based on binding to terpyridine derivatives. It is able to selectively detect Hg II ions over a number of environmentally relevant ions including Ca II, Pb II, Zn II, Cd II, Ni II, Cu II, and others. The response time upon exposure to Hg II is instantaneous. By the "naked eye," the detection limit of Hg II is 2 ppm (25 microM) in solution. With a spectrometer, this detection limit is increased down to 2 ppb (25 nM), which is the current EPA standard for drinking water. The significant problem of mercury poisoning requires new methods of detection that are sensitive and selective. Here we report a new simple system that takes advantage of the unique optical properties generated by terpyiridine-Hg complexes. |
| |
Keywords: | colorimetric chemistry mercury polymers sensors terpyridine |
本文献已被 PubMed 等数据库收录! |
|