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 HPO42− 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 HPO42−>SO42−>Cl−>NO3−>OAc−>I−>ClO4−. 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.
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Kumar et al. (2013) studied this question.
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