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KMID : 0615219780040010087
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Journal of Kwangju Health
1978 Volume.4 No. 1 p.87 ~ p.96
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Constant Current Coulometric Titration of Metal by Mercury-EDTA Complex.
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김일광
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Abstract
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A method for the constant current coulometric mercury-EDTA titrations has been examined. This method was useful for determination of radio chemical species by remote control. The principle is based upon the determination of various metal ions by the indirect electrical generation of ethylene diamine tetra acetic acid released upon reduction of mercury-EDTA chelate at platinum electrode.
The effects of pH, buffer, chelon and metal ions on the potentiometric titration curve has been studied by means of potential-pH diagram. Potential-pH diagrams allow a prediction of the extent of the end point break and thus a choice for optimal titration conditions.
The use of complex stability constant under controlled pH conditions made possible the potentiometric titration of multicomponent mixture.
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