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Electrochemical Determination of Boric Acid Using the Boric Acid–Tiron Complexation System
Author(s) -
Fujimori Takao,
Akimoto Hiroshi,
Tsuji Yutaka,
Takehara Kô,
Yoshimura Kazuhisa
Publication year - 2010
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.200900562
Subject(s) - tiron , boric acid , chemistry , inorganic chemistry , reagent , electrochemistry , boron , borax , cyclic voltammetry , phosphomolybdic acid , redox , voltammetry , dissociation (chemistry) , differential pulse voltammetry , nuclear chemistry , electrode , organic chemistry , raw material , enzyme , superoxide , catalysis
For monitoring the boron concentration in reverse osmosis (RO) water produced by desalination plants, a voltammetric determination method for the amount of electrochemically inactive boron has been developed by using the complexation with 4,5‐dihydroxybenzene‐1,3‐disulfonic acid (Tiron). Cyclic voltammetric measurements showed the oxidation peak of boric acid–Tiron 1 : 1 complex at 920 mV. This peak was successfully applied to the determination of boron in RO water with the LOD of 0.1 mg B dm −3 by using differential pulse voltammetry. The redox and acid–dissociation behaviors of Tiron and its boron complex are found to depend on the properties of pH buffer reagent.