AA3连续流动分析仪测定水样中硫化物的方法探讨.pdfVIP

.77. 第 16 期 孙恩恩:AA3连续流动分析仪测定水样中硫化物的方法探讨 AA3 连续流动分析仪测定水样中硫化物的方法探讨 孙思思 (通标标准技术服务有限公司云南分公司，云南昆明 653仪泊) 摘要:采用德国盹d 的AA3连续流动分析仪测定分析水样中的硫化物，方法:将水样注入到流动分析仪中，硫化物就会在醺住条件下郭 放出 H，S 气体，与对氨基二甲苯胶( N， N -二甲基-p- 苯二胶}和三氯化铁反应，~成蓝色杂料亚审基蓝，然后子660nm 处比色测定。 结果表明标准曲线在0.05 - 2. OmglL 范围内有很好的线性(r= l.()(削) ， 撞出限低至O.αXl7mg1L，精密度 RSD/J、于 1% ，对方法的回收 率做了实验.所得结果在97.90% -99.40%之间:灵敏度大大提高，操作便篷，分析速度达到50 个样品Ih ， 能满足大批量时间紧迫的批 量样品测试。 结论:该方法实际可行.操作简单易懂，批量测试准确快速。 关键词:本文流动注射-分光光度法;水中硫化物;测定 中由分类号:X832 文献串在识码:A 文，量.号: 1∞8 -02 1X(20 16) 16 -0077-03 Discussion on the Method of Continuous F10w Analyzer Detennination of Sulfide in Water Sampl臼 Sun Sisi (SGS -C臼C Slandards Technical Services Co. ,Ltd. ,Yunnan Branch ,Kunming 653仪)()， China) Abs衍act : Objective: To establish lhe analyti创1 method for delermination of sulfide in water by AA3 continuous flow injection analyzer. Meth叫s . ηle samples was flowed into the analyzer ,The H ,S gωwas released in the acid condition , with amino dimethyl aniline (N , N - dimethyl - p - phenylene diamine) and ferric trichloride to produce methylthionine , then to determind by colorimetric method at 660 nm. Results: 币le standard curve showed excellent linearity in the range of O. 05 田 2.0 mgl L ( r = 1.仪削) , and det础。n limit is O. 0007 mglL. Tbe pr悦ision of RSD is less 归11% ，四e results of he re∞very ra忧 。f the me曲。d obtained are in 97. 90% - 99. 40% ; Sensitivity is greaùy inc陀画ed，由e operation is conve.nient , Analysis of the speed to reach 50 samples / h ,it 毡 to meet 由e determination of large quantities of 锦mples in the 山gent time. Conclusi