A Facile Synthesis, Characterization of  Cinnamaldehyde Thiosemicarbazone and  Determination of Molybdenum (VI) by  Spectrophotometry In Presence of Micellar Medium

Dr. D. Gopala Krishna; Dr. G V Krishna Mohan

Volume : III, Issue : VIII, August - 2013

A Facile Synthesis, Characterization of Cinnamaldehyde Thiosemicarbazone and Determination of Molybdenum (VI) by Spectrophotometry In Presence of Micellar Medium

Dr. D. Gopala Krishna, Dr. G V Krishna Mohan

Abstract :

A rapid, simple, sensitive and selective spectrophotometric method has been developed for the determination of Molybdenum (VI) using Cinnamaldehyde thosemicabazone (CMTSC). Molybdenum (VI) forms a green coluored water–soluble complex with CMTSC in presence of Triton–X (100) (5%) (micellar medium) and the complex shows maximum absorbance while the reagent blank shows negligible absorbance at λmax 400 nm and at pH 4.0. Beers law was obeyed in the range 0.095–0.959 mg/mL and the optimum concentration range from ringbom plot was 0.191–0.863 mg/ mL of Molybdenum (VI). The molar absorptivity and Sandells sensitivity for the coloured solution are found to be 5.05x104 L mol–1cm–1 and 0.0018–µg.cm–2 respectively. The interference effect of various diverse ions has been studied. The complex shows 1:1 [Mo (VI): CMTSC] stoichiometry with stability constant 3.56x106 . The standard deviation of the method in the determination of 0.383–µg ml–1 of Molybdenum (VI) was 0.001. First and second order derivative spectrophotometric methods are developed at λmax 420 nm and 440 nm respectively for the determination of Molybdenum (VI) which was more sensitive than the zero order method. The developed method has been used for the determination of Molybdenum (VI) in foodstuffs, pharmaceutical samples and in alloys.