动力学荧光法测定痕量亚硝酸根的研究  

Study on Kinetic Fluorimetric Determination of Trace Nitrite

作　　者：陈兰化[1] 陈红旗[1] 陈兰化 陈红旗[1] 

机构地区：[1]淮北煤炭师范学院化学系，安徽淮北235000

出　　处：《淮北煤炭师范学院学报（自然科学版）》2004年第1期21-23,共3页Journal of Huaibei Coal Industry Teachers College(Natural Science edition)

摘　　要：基于在稀磷酸介质中,亚硝酸根对溴酸钾氧化二氯荧光素反应的催化作用,建立了催化荧光法测定亚硝酸根的新方法.反应在70℃水浴中进行10min,是假零级反应,方法的线性范围为0.4～8.0μg·L-1,检出限为2.0×10-10g·ml-1.该法简便、灵敏、选择性好,应用于水样中痕量亚硝酸根的测定,结果满意.A new catalytic fluorimetric method for determination of trace nitr ite has been developed. The method is based on the catalytic oxidation of dichlo ro fluorescein by potassium bromate in dilute phosphoric acid medium. The cataly tic reaction takes place at 70 ℃ water bath for 10 min.It is a pseudo-zero-order reaction. The linear range of determination is 0.4～ 12.0 -1, and the detection limit is 2.0× 10-10 g· ml-1. The method is simple, sens itive and selective.It has been applied to the determination of trace nitrite in water samples with satisfactory results.

关 键 词：动力学荧光法 痕量亚硝酸根 二氯荧光素 催化动力学分析法 标准溶液 

分 类 号：O657.3[理学—分析化学]