Direct and derivative spectrophotometric determination of gold (iii) using 3,5-dimethoxy-4-hydroxybenzaldehyde benzoylhydrazone(dmbbh) in presence of micellar medium.
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Date
2011-04
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Abstract
A simple and sensitive spectrophotometric method has been developed for the determination
of Gold (III) using 3,5-Dimethoxy-4-hydroxy benzaldehyde benzoylhydrazone (DMBBH) in a neutral
surfactant of Triton X-100(5%) (micellar medium). Gold (III) forms an wine red coloured water soluble
complex with the reagent in acidic medium pH 5.0. The molar absorptivity and Sandell’s sensitivity of
coloured species are 2.32 x 104 L.mol-1 cm-1 and 0.00862 mg/cm2 respectively. Beer’s law is obeyed in the
range 0.4925-5.91 mg/ml of Au(III) at lmax at 380 nm. The developed derivative spectrophotometric method
was employed for the determination of gold (III). This method has been satisfactorily applied for the
determination of gold (III) in water samples and pharmaceutical samples.
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Keywords
Gold (III), 3,5-dimethoxy-4-hydroxybenzaldehyde benzoylhydrazone(DMBBH), Micellar Medium, derivative spectrophotometry
Citation
Bai K Aruna, Chandrasekhar K B, Devanna N. Direct and derivative spectrophotometric determination of gold (iii) using 3,5-dimethoxy-4-hydroxybenzaldehyde benzoylhydrazone(dmbbh) in presence of micellar medium. International Journal of Applied Biology and Pharmaceutical Technology. 2011 Apr-June; 2(2): 62-68.