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拟定了一个荧光猝灭法测定痕量亚硝酸根的新方法。在盐酸介质中，亚硝酸根氧化 碘化钾的反应，其反应产物Ｉ３－使罗丹明Ｂ荧光猝灭。方法的检出限为３．６μｇ／Ｌ；测定范围为 １０～１２０μｇ／Ｌ。方法简便快速、选择性好，用于自来水，矿泉水及合成样品中亚硝酸根的测定， 结果满意。
A new fluorescence quenching method for the determination of trace nitrite was developed. In hydrochloric acid medium, nitrite oxidizes the reaction of potassium iodide, and its reaction product I3-quenches the fluorescence of rhodamine B. The detection limit of the method was 3.6μg / L; the determination range was 10 ~ 120μg / L. The method is simple, rapid and selective. It is suitable for the determination of nitrite in tap water, mineral water and synthetic samples with satisfactory results.