Non-Extractive Simultaneous Spectrophotometric Determination of Trace Quantities of Palladium(II) and Tungsten(VI)

A second order derivative spectrophotometric method has been developed for the simultaneous determination of Palladium(II) and Tungsten(VI) using 3,4-dihydroxybenzaldehyde isonicotinoylhydrazone (3,4-DHBINH) as a new complexing agent. The Pd(II) reacts with 3,4-DHBINH in the pH range from 3 to 7 to...

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Bibliographic Details
Published in:Analytical letters 2011-03, Vol.44 (5), p.815-823
Main Authors: Srinivas, J., Kumar, A. B. V. Kiran, Thangadurai, T. Daniel, Rao, V. Suryanarayana, Yoo, Young-Jae, Lee, Yong-Ill
Format: Article
Language:English
Subjects:
3,4-Dihydroxybenzaldehyde isonicotinoylhydrazone (3,4-DHBINH)
Calibration
Color
Derivative spectrophotometry
Derivatives
Hydrogenation
Industrial wastes
Mathematical analysis
Optimization
Palladium
Spectrophotometry
Trace analysis
Tungsten
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Summary:A second order derivative spectrophotometric method has been developed for the simultaneous determination of Palladium(II) and Tungsten(VI) using 3,4-dihydroxybenzaldehyde isonicotinoylhydrazone (3,4-DHBINH) as a new complexing agent. The Pd(II) reacts with 3,4-DHBINH in the pH range from 3 to 7 to form green colored solution. The absorbance calibration curves were constructed for palladium(II) at 362 nm (0.53∼6.40 μg/ml) and tungsten(VI) at 374 nm (0.92∼11.40 μg/ml). The metal ions interfere with each other in determination of zero order as well as the first order spectrophotometry. The optimum condition for maximum color development and other analytical parameters were evaluated. The method was applied successfully for the determination of palladium in hydrogenation catalyst and tungsten in industrial waste water samples.
ISSN:0003-2719
1532-236X
DOI:10.1080/00032711003790056