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在阳离子表面活性剂存在下,利用邻苯二酚紫,苯基萤光酮,茜素紫等试剂测定锡的方法具有较高的灵敏度。例如,苯基萤光酮-溴化十六烷基三甲基铵法的摩尔吸光系数可达到1.34×10~5。本文研究用水杨基萤光酮(SAF)-溴化十六烷基三甲基铵(CTMAB)分光光度法测定微量锡。本法在灵敏度和选择性方面比上述各法均有较大的提高。方法的表观摩尔吸光系数。ε=1.79×10~5(在751型分光光度计上测得)。由于显色反应的酸度较高,因此,除钛、钼、钨、锑
In the presence of cationic surfactants, the method for the determination of tin using catechol violet, phenylfluorone and alizarin violet reagents has high sensitivity. For example, the molar absorptivity of phenylfluorone-cetyltrimethylammonium bromide can reach 1.34 × 10 -5. In this paper, salicyl fluorone (SAF) - cetyltrimethylammonium bromide (CTMAB) spectrophotometric determination of trace tin. This Law has been greatly improved in sensitivity and selectivity over the above-mentioned various laws. The apparent molar absorptivity of the method. ε = 1.79 × 10 ~ 5 (measured on a Model 751 Spectrophotometer). Due to the high acidity of the color reaction, titanium, molybdenum, tungsten and antimony are therefore excluded