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New polycrystalline solid state responsive electrodes for the determination of the selenite ion
Author(s) -
Zareh Mohsen M.,
Amin Alaa S.,
AbdelAziz Manar
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140070616
Subject(s) - selenium , electrode , selectivity , chemistry , solubility , ion , analytical chemistry (journal) , inorganic chemistry , crystallite , linear range , usable , chromatography , detection limit , organic chemistry , crystallography , world wide web , computer science , catalysis
New electrodes for the selective determination of selenite were constructed by compressing either HgSeO 3 or a mixture of HgSeO 3 and Hg 2 Cl 2 . The linear concentration range was 6.0 × 10 −5 −10 −1 M with a slope of 29.5 mV/concentration decade. The usable pH range for both electrodes was wide (3–10) and their life span was up to 8 days. Selectivity coefficient values were determined for various anions and no significant interferences were observed for most of them. The solubility products of some sparingly soluble selenite salts were determined using the latter electrode.