【摘要】 建立了用于后处理工艺料液中亚硝酸根的荧光分析方法。方法以5-氨基荧光素为指示剂,在盐酸溶液中,亚硝酸根与5-氨基荧光素发生重氮化反应,其产物在碱性条件下有很强的荧光,据此测定亚硝酸根的含量。结果表明,所测样品的相对标准偏差和回收率分别为:后处理台架工艺料液,4%,96%~106%;高放废液,5%,96%~103%。方法可应用于后处理工艺料液中亚硝酸根的测定和有机废物中硝基化合物的测定。更多还原

【Abstract】 A new fluorimetric method for determination of nitrite was studied,based on the reaction of 5-aminofluorescein in acidic medium to form a new compound which was no fluorescence and reduced to highly fluorescence in alkaline medium.Effects of metal ions impurity were discussed.The acidity and measuring time were given.The precision of this method are 4% and 5% respectively.The recoveries are between 96% and 106% in nuclear fuel reprocessing solution and between 96% and 103% in high-level radioactive liquid waste.The method is applied to the determination of NO-2 in nuclear fuel reprocessing solution and high-level radioactive liquid waste and nitrocompound in organic liquid waste.更多还原