Potentiometric response of a neutral-carrier-based membrane to aqueous mercury in Cl(-)-rich media.
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 Hg(2+). 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 Hg(2+).
Department of Chemistry, Seoul National University, Korea.
Yunmi
Y
Kim
Jongwon
J
Kim
Kyoung Nam
KN
Kim
Suk-Kyu
SK
Chang
Taek Dong
TD
Chung
D047250:Calixarenes / Q000737:chemistry; D002712:Chlorides / Q000032:analysis / Q000737:chemistry*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D008567:Membranes, Artificial; D008628:Mercury / Q000032:analysis*; D011108:Polymers / Q000737:chemistry; D011199:Potentiometry; D014867:Water / Q000737:chemistry*
D002712:Chlorides; D008567:Membranes, Artificial; D011108:Polymers; D014867:Water; D047250:Calixarenes; D008628:Mercury