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催化电位法测定环境水样中痕量亚硝酸根的研究 被引量:1

Catalytic kinetic potentiometry for the determination of trace nitrite in water samples
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摘要 研究了以亚硝酸根对溴酸钾氧化碘化钾的催化作用,用碘离子选择电极跟踪测定催化体系的电位。实验表明,在适宜的条件下,该指示反应为拟一级反应;电位差与亚硝酸讯浓度在测定条件下呈线性关系,其检出限为3.0×10^(-5)mg/mL。该法用于环境水样的测定,其结果良好。 A catalytic kinetic potentiometry for detemination of trace nitrite has been develoed. The method is based on the oxidation of iodide by potassium bromate which can be catalyzed by nitrite. The concentration of iodide is follow by iodide ion-selective electrode. Under the suitable conditions, the indicator reaction is first-order. The AE is linear with concentration of nitrite in the determination range. The detection limit of nitrite is 3.0× 10-8 mg/mL. This method has used to the determination of trace nitrite in water sample of environment with satisfactory results.
作者 陈铭 王立涛
出处 《福建分析测试》 CAS 2003年第1期1692-1693,共2页 Fujian Analysis & Testing
关键词 催化动力学电位法 亚硝酸根 溴酸钾 氧化 碘化钾 环境水样 Catalytic kinetic potentiometry Nitrite Water samples of environment
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  • 1[5]刘福铃,戴行均.食品物理与化学分析法.北京:轻工业出版社,1987.185.

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