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Electrochemical determination of boric acid using the boric acid-tiron complexation system

机译:硼酸-铁络合体系电化学测定硼酸

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摘要

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 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.
机译:为了监测海水淡化厂生产的反渗透(RO)水中的硼浓度,已开发了一种伏安法,该方法通过与4,5-二羟基苯-1,3-二磺酸(Tiron)络合来测定电化学惰性硼的量)。循环伏安法测量表明,在920 mV处,硼酸-铁1:1络合物的氧化峰。通过使用差分脉冲伏安法,该峰成功地用于了LO值为0.1 mg B dm的RO水中硼的测定。发现Tiron及其硼配合物的氧化还原和酸解离行为取决于pH缓冲剂的性质。

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