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由于阳离子表面活性剂溴化十六烷基吡啶CPB与苯芴酮-锡生成三元络合物,不但提高了灵敏度,而且有明显的增溶作用,因而广泛地被采用,本文着重地探讨了试样中主要成份硅酸在显色中既有干扰显色,又有催化显色的作用。只要操作得当,SiO_2浓度在13毫克/25毫升中,仍可进行正常显色。于锡标准中加入5毫克SiO_2 (25毫升体积),有良好的催化作用。它适用于硅石、石英脉、硅酸盐、花岗岩等矿石中微量锡的测定。检出灵敏度为0.01 ppm,测定范围为含锡0—65微克/25毫升。
As the cationic surfactant cetylpyridinium bromide CPB and benzofluorenone - tin ternary complex generated not only increased sensitivity, and significant solubilization, which has been widely used, this paper focuses on the The main component in the sample of silicic acid in the color development both interference color, but also the role of catalytic chromogenic. As long as the proper operation, SiO 2 concentration of 13 mg / 25 ml, can still be normal color. In the tin standard by adding 5 mg SiO 2 (25 ml volume), has a good catalytic effect. It is suitable for the determination of trace tin in silica, quartz vein, silicate, granite and other ores. The detection sensitivity is 0.01 ppm and the measurement range is 0-65 μg / ml with tin.