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玻璃中氧化钙的测定,通常采用EDTA络合滴定法,由于终点不灵敏,误差较大。当玻璃中存在大量氧化钡时,为了消除钡的干扰,需以硫酸盐的形式进行过滤分离,手续繁琐冗长。本工作拟定一个原子吸收测定高钡光学玻璃中氧化钙的简易方法,选用镧作释放剂消除铝的干扰,在标准溶液中加入与分析溶液相同浓度的钡控制钡的影响。分析过程简单、快速、准确度高。并适用一般光学玻璃中氧化钙的测定。干扰情况:钡冕光学玻璃组成复杂,在用原子吸收测定钙时,不仅铝的干扰十分严重,而且同族钡离子的电离干扰也是不可忽视的,特别是
Determination of calcium oxide glass, EDTA complexometric titration is usually used, because the end is not sensitive, greater error. When there is a large amount of barium oxide in the glass, in order to eliminate the interference of barium, it is necessary to carry out filtration and separation in the form of sulfate, and the procedure is tedious and tedious. This work to develop a simple method for the determination of calcium oxide in high-barium optical glass by atomic absorption spectrometry, the use of lanthanum as a release agent to eliminate the interference of aluminum, adding the same concentration of barium-controlled barium as the analytical solution in the standard solution. The analysis process is simple, fast and accurate. And for the general determination of calcium oxide optical glass. Interference: Barium crown optical glass composition is complicated, in the determination of calcium by atomic absorption, not only the interference of aluminum is very serious, but also the ionization interference of barium ions of the same family can not be ignored, in particular