This paper emphatically studies on the technologies of removing iron ion by using pink vat dye R and,through comparison,holds that only the EDTA method can make the content of iron ion reach the regulated standard among chemical iron ion removing methods.

All compouds were characterized by element analysis,IR,Uv,FR,the copper content of the complexes were determined by EDTA method;the molar conductivity of the complexes were measured,and the electrochemical properties of the complexes were studied by cyclic voltammetry.

Observation of the stability of ACD-EDTA anticoagulated blood in refrigeration for complete blood cell counts;

Determination of total iron in cold-compacted bulk for converter steelmaking with EDTA titration;

Adjustment and Control of Acidity by EDTA titration,;

Determination of magnesium during producing electrolytic manganese by manganese dioxide precipitation-EDTA titration;

However there are many restrictions for applying EDTA titration method in engineering practice.

In this paper the mechanism of the EDTA titration method is expatiated and t.

It illustrates the concept of EDTA titration method,introduces in detail the methods of EDTA titration method quickly measuring cement stability and content and points out that titrated results revised by revising curve ages of which has been considered can assure accuracy of made-up testing results better.