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Spectrophotometric studies and analytical application of gold(III), yttrium(III) and palladium(II) chelates with 7‐(2‐pyridylazo)‐5‐chloro‐8‐hydroxyquinoline
Author(s) -
Zuhri Ali Z. Abu,
Rady Adel H.
Publication year - 1992
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280540108
Subject(s) - 8 hydroxyquinoline , palladium , yttrium , chelation , chemistry , nuclear chemistry , inorganic chemistry , organic chemistry , catalysis , oxide
Abstract A spectrophotometric study of Au(III), Y(III) and Pd(II) complexes of a reagent 7‐(2‐pyridylazo)‐5‐chloro‐8‐hydroxyquinoline (PACHQ) is presented. Gold(III) forms a 2:1 (L:M) violet complex at pH 9.5 (50% ethanol), while Y(III) and Pd(II) form 2:1 (L:M) red complexes at pH 6.5 and 7.5 respectively. The stability of these complexes has been determined. Beer's law is valid over the concentration range 0‐7.87, 0‐8.89 and 0‐10.64μg ml −1 for Au(III), Y(III) and Pd(II) respectively. A number of foreign ions were tested for their interference. Synthetic solutions identical in composition to some Au(III) and Y(III) alloys are used to ascertain the suitability of the reagent.