【摘要】 研究了在碱性介质中， 基于氨（ 铵离子） 与邻苯二甲醛及２ － 巯基乙醇反应生成强荧光性吲哚取代衍生物的体系测定微量氨（ 铵离子） 的流动注射荧光分析法． 非离子表面活性剂曲拉通Ｘ－１００ （Ｔｒｉｔｏｎ Ｘ－ １００） 对该体系具有良好的增稳作用． 研究了该体系测定氨（ 铵离子） 的最佳实验条件． 测定氨（ 铵离子） 的线性范围０ ～０－７ｍｇ／Ｌ， 相对标准偏差为１－３ ％ （ ＣＮＨ３ ＝ ０－２ｍｇ／Ｌ，ｎ ＝ １１） ，检测限为０－００１２ｍｇ／Ｌ．更多还原

【Abstract】 A method is described for determination of trace ammonia by fluorescence spectrophotometer combining with flow-injection Analysis. The method is based on the system:in base media,ammonia reacts with o-phthaladehyde(OPA) and 2-mercaptoethanol(ME) producing derivative of indol which has intensive fluorescence. Nonionic surfactant Triton X-100 enhances stability in the system. The optimum reaction condition is investigated. A linear relationship between ammonia concentration and fluorescent intensity is observed over the range 0 1～0 7mg/L with a relative standard deviation(RSD) of 1 3% at ammonia concentration of 0 2 mg/L(n=11). The limit of determination is 0 001 2mg/L.更多还原