亚硝酸根的催化动力学光度法测定  

Catalytic Spectrophotometric Determination of Trace Nitrite

作　　者：张荣昌[1] 董国臣[1] 奚洪民[1] 杨锐[1] 夏婷杰 

机构地区：[1]北华大学,师范理学院,吉林,吉林,132013 [2]吉林市产品质量监督检验所,吉林,吉林,132013

出　　处：《北华大学学报（自然科学版）》2001年第3期207-208,共2页Journal of Beihua University（Natural Science）

摘　　要：在酸性介质中,NO-2对KBrO3氧化甲基红反应有强烈的催化作用,研究了反应的动力学条件,建立了测定痕量NO-2的新方法,方法的测定范围为0.32～4.8μg/L,检出限为5.4×10-11g/L.该方法简便、灵敏,选择性好,用于水样中NO-2的测定,结果满意.A new kinetic spectrophotometry method for the determination of trace amount of nitrite was proposed. In the presence of nitrite, methyl red can be oxidized with potassium bromate in acid solution. The optimum condition influencing the rate of catalytic reaction was established. The range of determination is 0.32～4.8*!μg/L and detective limit is 5.4×10 -11g/L. The method is sensitive, simple and selective to be used for the determination of trace nitrite in water with satisfactory results.

关 键 词：亚硝酸根 甲基红 催化光度法 

分 类 号：O613.61[理学—无机化学] O657.32[理学—化学]