Chelatometric Titration of Cadmium with Gallein Indicator | Zendy

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Chelatometric Titration of Cadmium with Gallein Indicator

Author(s) -

Sun PengJoung

Publication year - 1962

Publication title -

journal of the chinese chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.329

H-Index - 45

eISSN - 2192-6549

pISSN - 0009-4536

DOI - 10.1002/jccs.196200004

Subject(s) - chemistry , titration , magenta , cadmium , inorganic chemistry , salt (chemistry) , chloride , ammonium , ammonia , equivalence point , ammonium chloride , nuclear chemistry , potentiometric titration , organic chemistry , ion , materials science , inkwell , composite material

It has been found that gallein can be used as an indicator in the direct chelatometric titration of a number of metals. A method based on this fact has been devised for the chelatometric determination of cadmium with disodium salt of EDTA. The optimum p H for the titration was found to be 9.5 to 10. A buffer solution consisting of ammonia and ammonium chloride was used to keep the solution at this optimum p H in the titration. The color of indicator changed from violet to magenta red at the end point. No interference was observed in the presence of a variety of anions and univalent cations.

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