Simultaneous Determination of Nickel (II) and Cobalt  (II) Using Cinnamaldehyde Thiosemicarbazone by  First Order Derivative Spectrophotometric Technique  in Presence of Micellar Medium

Dr. D. Gopala Krishna; Ch. Kethani Devi

Volume : III, Issue : V, May - 2013

Simultaneous Determination of Nickel (II) and Cobalt (II) Using Cinnamaldehyde Thiosemicarbazone by First Order Derivative Spectrophotometric Technique in Presence of Micellar Medium

Dr. D. Gopala Krishna, Ch. Kethani Devi

Abstract :

Cinnamaldehyde thiosemicarbazone (CMTSC) was used as chromogenic reagent for Simultaneous spectrophotometric determination of Nickel (II) and Cobalt (II) ions. The reagent (CMTSC) gives intense yellow colour water soluble complexes with Nickel (II) and Cobalt (II) in presence of micellar medium (Triton–X–100 (5%) at pH 9.0. The maximum absorbance was observed at λmax 440 and 400 nm for Nickel (II) and Cobalt (II) respectively. The molar absorptivity and sandell’s sensitivity for Nickel (II) and Cobalt (II) complexes are found to be 4.77x104 , 4.70x104 L.mol–1 .cm–1 and 0.0012, 0.0012 µg/cm2 respectively. The reagent (CMTSC) forms 1:1 [M:L] complexes with Nickel (II) and Cobalt (II) with stability constants 8.17x 105 and 10.10x106 respectively. The First order derivative spectrophotometric technique has been developed for the simultaneous determination of Nickel (II) and Cobalt (II) at λmax 460 and 420 nm.