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络合物置换法比色测定水中微量硬度,冯明(兰州医学院化学教研组)未发表,利用EDTA和钙镁络合物的稳定性不同,可以在水样中加入足够量的EDTA-Mg
Complex colorimetric determination of trace hardness in water, Feng Ming (Lanzhou Medical College of Chemistry Teaching and Research Group) unpublished, the use of EDTA and calcium and magnesium complexes of different stability, can be added to the water sample sufficient amount of EDTA-Mg