Determination of Thorium (IV) by Derivative Spectrophotometric Technique.

Authors

  • G.V.S. Vallinath Department of chemistry, Jawaharlal Nehru Technological University, Anantapur-515002, Andhra Pradesh, India.
  • K.B. Chandrasekhar Department of chemistry, Jawaharlal Nehru Technological University, Anantapur-515002, Andhra Pradesh, India.
  • N. Devanna Department of chemistry, Jawaharlal Nehru Technological University, Anantapur-515002, Andhra Pradesh, India.

Abstract

A simple and sensitive spectrophotometric method has been developed for the determination of Thorium (IV) using newly synthesized reagent 3,5-Dimethoxy-4-hydroxybenzaldehyde isonicotinoyl hydrazone (DMHBIH). Thorium (IV) forms an Yellow coloured water soluble complex with the reagent in acidic medium pH 3.0. The molar absorptivity and Sandell's sensitivity of coloured species are 4.84 x 104 L.mol¯¹ cm¯¹ and 0.0083 µg/cm² respectively. Beer's law is obeyed in the range 0.580-5.80 µg/ml of Thorium(IV) at max at 390 nm. Thorium (IV) forms a 1:1 complex and stability constant of the complex is 4.176 x 10º the developed derivative spectrophotometric method has been satisfactorily applied for the determination of Thorium (IV) in monazite sand.

Keywords:

Thorium(IV), 3,5-dimethoxy-4-hydroxybenzaldehyde isonicotinoylhydrazone(DMHBIH), derivative spectrophotometry

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Published

2025-01-01
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Vol. 2 No. 3 (2010): Volume 2,Issue3

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Articles