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当前,氯碱工业新发展的钌钛阳极,其涂层中钌含量是关系到阳极质量的一项极为重要的工艺指标。这里介绍一种用KOH-KNO_3碱熔法剥落阳极涂层,并添加含钛-钾基体的缓冲液,使钛、钌重量比大于24:1。制得的分析溶液用空气-乙炔火焰原子吸收光谱法测钌。由于钛-钾基体的存在,不仅消除了钛、镍、钾等元素对测钌的干扰,而且利用钛对钌吸收的增感效应,使测钌灵敏度提高到0.4ppm/1％吸收,与盐酸基体相比较,灵敏度增加了1.7倍。试验结果表明:方法正确可靠,重现性好。相对误差1～2％,
Currently, the newly developed ruthenium titanium anode in the chlor-alkali industry, the ruthenium content in the coating, is an extremely important process index that is related to the quality of the anode. Here is a KOH-KNO_3 alkaline melt exfoliation of the anode coating, and the addition of titanium-potassium matrix buffer, titanium, ruthenium weight ratio greater than 24: 1. The resulting analytical solution was measured for ruthenium using air-acetylene flame atomic absorption spectrometry. Due to the existence of titanium-potassium matrix, the interference of ruthenium with titanium, nickel, potassium and other elements is eliminated, and the sensitivity of ruthenium to titanium is enhanced to 0.4 ppm / 1% by virtue of the sensitization effect of titanium to ruthenium absorption. Compared with the matrix, the sensitivity increased by 1.7 times. The test results show that the method is correct and reproducible. Relative error of 1 to 2%