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An All Solid State Potentiometric Sensor for Monohydrogen Phosphate Ions
Author(s) -
Kumar Pankaj,
Kim DongMin,
Hyun Myung Ho,
Won MiSook,
Shim YoonBo
Publication year - 2013
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.201300142
Subject(s) - potentiometric titration , thiourea , chemistry , selectivity , phosphate , inorganic chemistry , ionophore , ion , nuclear chemistry , chloride , potentiometric sensor , barium chloride , titration , organic chemistry , calcium , catalysis
An all solid state potentiometric sensor using anthracene thiourea derivative as ionophore was developed. It exhibited a near‐Nernstian slope of 30.8±1.0 mV/decade of activity for HPO 4 2− ions in the concentration range of 1.0×10 −7 –1.0×10 −3 M at pH 7.4. It displayed excellent selectivity for monohydrogen phosphate over other anions and the selectivity sequence was determined as HPO 4 2− >SO 4 2− >Cl − >NO 3 − >OAc − >I − >ClO 4 − . The developed sensor was evaluated for the analysis of monohydrogen phosphate ions in a standard reference material (SRM 1548) as well as in the potentiometric titration of phosphate ions with a barium chloride solution.