【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 .更多还原

【Abstract】 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.更多还原