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中文摘要：
针对检测水中磷酸根离子浓度的问题,研究了一种以玻碳为基底的固态磷酸根离子选择电极。在一定条件下采用循环伏安法聚合硫酸钴和硫酸钠的混合溶液,并根据正交实验得出电极最佳制备条件。采用直接电位法测定电极性能指标,得到斜率为-41.7 m V,检测下限为6.3×10-5mol·L-1,电极的线性响应范围在10-110-4mol·L-1的固态磷酸根离子选择电极;电极具有较短的响应时间,很好的稳定性,对磷酸根的检测研究具有一定的意义。
英文摘要：
A solid-state,phosphate ion selective electrode film that used a glassy carbon electrode substrate,was developed for determination of the phosphate concentration in water. The sensitive membrane consisting of CoSO4 and Na2SO4was polymerized under certain conditions using cyclic voltammetry. Based on the orthogonal experiments,optimal parameters for the electrode preparation were obtained. Characteristics of the electrode were evaluated by using a direct potentiometric determination. The electrode exhibited a linear potential response in the concentration range from 10- 1to 10- 4mol·L-1,with a slope of- 41. 7 m V and a low detection limit of 6. 3 × 10- 5mol·L-1. Furthermore,it also displayed a shorter response time and good stability. This study will have a positive significance for the research of phosphate detection.
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