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研究了纳米La(OH)3修饰电极的制备及其对邻苯二酚和对苯二酚的电催化作用。讨论了支持电解质种类、酸度等对邻苯二酚和对苯二酚伏安响应的影响,获得了较为优化的实验条件。在0.1mol/LPBS(pH7.0)中,采用示差脉冲伏安测定邻苯二酚和对苯二酚,其浓度与氧化峰电流线性关系良好。共存的多种金属离子、抗坏血酸及等量的苯酚等不干扰测定。该电极用于模拟废水样中邻苯二酚和对苯二酚的测定,结果令人满意。
The preparation of nanocrystalline La (OH) 3 modified electrode and its electrocatalysis on catechol and hydroquinone were studied. The influence of electrolyte type and acidity on the voltammetric response of catechol and hydroquinone was discussed. The optimal experimental conditions were obtained. In 0.1mol / LPBS (pH7.0), the differential pulse voltammetry catechol and hydroquinone, its concentration and the oxidation peak current is good. Coexistence of a variety of metal ions, ascorbic acid and the same amount of phenol does not interfere with the determination. The electrode was used to simulate the determination of catechol and hydroquinone in wastewater samples with satisfactory results.