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测定低于1%的氯含量,常用光度法,当样品中含有磷、硫、氟元素时产生干扰,离子选择电极法,库仑法,原子吸收光谱法,色谱法等,重复性较差。本文采用可见-紫外浊度法测定了不同牌号粘合剂,磷腈氟橡胶以及对-羟基苯甲酸等样品中的微量氯,并对分析条件进行了讨论。实验部分一仪器与试剂岛津QC型分光光度计,1厘米比色Ⅲ;500毫升Schoniger燃烧瓶;10毫升微量滴定管。标准氯化钠溶液。
Determination of less than 1% of the chlorine content, commonly used spectrophotometry, when the sample contains phosphorus, sulfur, fluorine interference, ion-selective electrode method, coulometry, atomic absorption spectrometry, chromatography, poor repeatability. In this paper, the determination of trace chlorine in different grades of binders, phosphazene fluoroelastomers and p-hydroxybenzoic acids by visible-UV turbidity method, and the analysis of the conditions were discussed. Experimental section An instrument and reagents Shimadzu QC spectrophotometer, 1 cm colorimetric III; 500 ml Schoniger flask; 10 ml microtiter. Standard sodium chloride solution.