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Potentiometric Response of a Neutral-carrier-based Membrane to Aqueous Mercury in Cl--rich Media
- Issue Date
- Apr-2009
- Publisher
- JAPAN SOC ANALYTICAL CHEMISTRY
- Citation
- ANALYTICAL SCIENCES, v.25, no.4, pp 567 - 570
- Pages
- 4
- Journal Title
- ANALYTICAL SCIENCES
- Volume
- 25
- Number
- 4
- Start Page
- 567
- End Page
- 570
- ISSN
- 0910-6340
- Abstract
- The unique potentiometric response of mercury sensors was investigated in aqueous Cl--rich media, which are often encountered in natural, especially biological samples. The conventional neutral-carrier-based Hg(II)-ISEs are not practically useful because the Cl- concentrations in natural aqueous samples are normally too high for mercury to be present in the form of Hg2+. Negative potentiometric slopes, which are the opposite behavior of the previously reported Hg(II)-ISEs, were experimentally confirmed and quantitatively reasoned based on the aqueous solution equilibrium of Hg2+.
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