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edta pei wei di ding fa ce ding cao zhong dian pan duan chu tan
Pages: 43-44
Year: Issue:  4
Journal: Yunnan Building Materials

Keyword:  终点判断滴定法测定直射光色衬EDTA观察视角混合指示剂毫升数配位空白试验;
Abstract: 通常我们测定水泥中CaO含量时用EDTA配位滴定法。预先在酸性溶液中加入适量氟化钾,以抑制硅酸的干扰,然后在pH13以上强碱性溶液中以三乙醇胺为掩蔽剂,用钙黄绿素—甲基百里香酚蓝—酚酞混合指示剂,以EDTA标准溶液滴定。然而,我们在滴定过程中发现,...
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