Spectrophotometric Studies of Cobalt (II) Chelate of  P ‐(2‐Hydroxy‐1‐Naphthylazo) Benzenesulphonate | Zendy

Hseu TongMing | Zendy; Ko SuYa | Zendy

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Spectrophotometric Studies of Cobalt (II) Chelate of P ‐(2‐Hydroxy‐1‐Naphthylazo) Benzenesulphonate

Author(s) -

Hseu TongMing,

Ko SuYa

Publication year - 1971

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.197100025

Subject(s) - cobalt , chemistry , chelation , ionic strength , aqueous solution , stoichiometry , ionic bonding , inorganic chemistry , nuclear chemistry , analytical chemistry (journal) , ion , chromatography , organic chemistry

Cobalt(II) chelate of p‐(2‐hydroxy‐1‐naphthylazo)benzenesulphonate (orange II) has been studied spectrophotometrically in aqueous solution at 25° and at an ionic strength of 0.10 M . The formation of this chelate is p H dependent, the optimum p H range is between 9.5 to 10.8. Its mole ratio of ligand to cobalt(II) is 3 to 1 stoichiometry and the formation constant, logK, is determined as 19.17±0.13. By using the wave‐length of 357 mμ, determination of trace amount of cobalt(II) with the sensitivity of 0.077 y /cm 2 is possible.

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