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1957年Treindl提出了示波滴定法,经过高鸿和Stefanovic等人工作,有很大发展和完善。高鸿曾提出,不需要另加其他掩蔽剂,在大量镁存在下用EGTA滴定钙,方法简便,准确性好,并扩展了钙的测定范围。这种新的电化学滴定方法,滴定体系的颜色和沉淀物的存在并不影响终点的确定,所以我们尝试在大量棕色碱式氧化锰存在条件下,用EDTA直接滴定钙,也得到满意结果。锰矿石、锰矿渣、工业碳酸锰中钙的测定,在现行分析中都需要将锰分离或用氰化
1957 Treindl proposed oscillometric titration, after Gao Hong and Stefanovic et al work, great development and improvement. Gao Hong has proposed, without additional masking agent, in the presence of large amounts of magnesium with EGTA titration of calcium, the method is simple, accurate, and expanded the determination of calcium. The new electrochemical titration method, the color of the titration system and the presence of the precipitate did not affect the determination of the end point. Therefore, we tried to titrate the calcium directly with EDTA in the presence of a large amount of brown alkaline manganese oxide, and satisfactory results were obtained. Manganese ore, manganese slag, industrial manganese carbonate in the determination of calcium in the current analysis are required to separate manganese or cyanide