碘化钾紫外分光光度法测定水中微量亚硝酸根

Using Iodide Kalium Ultraviolet Spectrophoto-metric to Measure Minim Nitrous Acid Silver

基于在盐酸介质中,NO-2与I-起氧化-还原反应,反应产物I2对波长287nm的光有灵敏的吸收,建立了碘化钾紫外分光光度法测量微量NO-2的方法。该方法检出限为0.003mg/L;测定范围为0.01mg/L～0.1mg/L。所用试剂无污染,可用于自来水、矿泉水等水体中微量亚硝酸根的测定。

In muriatic acid medium,NO^-_2 and I^- reacted in oxidation-deoxidize form,the resultant in absorbs wavelengh of 287 mm flexibly so to form the method to mesure minim NO^-_2 using iodide kalium ultraviolet spectrophoto-metric,this mothod can detect 0.03 mg/l～0.1 mg/l,its reagent has no contanimnation and can be used to mesure sub-nitric acid root in tap and mineral water.