【摘要】 工业生产和控制中钙镁测定多采用EDTA络合滴定分析。在实际测定中,我们发现钙指示剂-萘酚绿B于pH=12时,EDTA络合滴定钙;以及酸性铬蓝K-铬黑T-萘酚绿B为指示剂于pH=10时,EDTA络合滴定钙镁合量均具有广泛的适应性。曾用于白云石、石灰石、烧结矿、啤酒中的钙镁测定,取得满意结果。并对指示剂的变色机理作了初步探讨。更多还原

【Abstract】 Indicators in titrimetric analysis of calcium and magnesium with EDTA were improved in this paper.The new indicators can be applied widely to a lot of real samples.The principle of indicators were studied with spectrophotometry.更多还原