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G. G. Guilbault and P. J. Bringnac, Jr., “Study of Various Inorganic Phosphate Salts Impregnated in Silicone Rubber as Potential Indicating Electrodes for Phosphate Ion,” Analytical Chemistry, Vol. 41, No. 8, 1969, pp. 1136-1138. doi:10.1021/ac60277a027

has been cited by the following article:

• TITLE: Electrodeposited Cobalt-Iron Alloy Thin-Film for Potentiometric Hydrogen Phosphate-Ion Sensor

  AUTHORS: Toru Kidosaki, Satoko Takase, Youichi Shimizu

  KEYWORDS: Hydrogen-Phosphate Ion Sensor; Cobalt-Iron Alloy; Thin-Film Electrode; Electrodeposition

  JOURNAL NAME: Journal of Sensor Technology, Vol.2 No.3, September 26, 2012

  ABSTRACT: A cobalt-iron alloy thin-film electrode-based electrochemical hydrogen-phosphate-ion sensor was prepared by electrodepositing on an Au-coated Al2O3 substrate from an aqueous solution of metal-salts. The use of a cobalt-iron alloy electrode greatly improved the hydrogen-ion sensor response performance, i.e., the sensor worked stably for more than 7 weeks and showed a quick response time of several seconds. Among the cobalt and iron alloy systems tested, the electrodeposited Co58Fe42 thin-film electrode showed the best EMF response characteristics, i.e., the sensor exhibited a linear potentiometric response to hydrogen-phosphate ion at the concentration range between 1.0 × 10–5 and 1.0 × 10–2 M with the slope of –43 mV/decade at pH 5.0 and at 30℃. A sensing mechanism of the Co-based potentiometric hydrogen-phosphate ion sensor was proposed on the basis of results of instrumental analysis.