Electrochemical Determination of Boric Acid Using the Boric Acid–Tiron Complexation System |
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| Authors: | Takao Fujimori Hiroshi Akimoto Yutaka Tsuji Kô Takehara Kazuhisa Yoshimura |
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| Institution: | 1. Department of Chemistry, Faculty of Sciences, Kyushu University, 6‐10‐1, Hakozaki, Fukuoka 812‐8581, Japan;2. Research Fellow of the Japan Society for the Promotion of Science (JSPS Research Fellow), 8 Ichibancho, Chiyoda‐ku, Tokyo 102‐8472, Japan;3. Kurume National College of Technology, 1‐1‐1, Komorino, Kurume 830‐8555, Japan |
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| Abstract: | 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. |
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| Keywords: | Boron determination Tiron Cyclic voltammetry DPV Phosphate buffer effect |
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