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International Letters of Chemistry, Physics and Astronomy
Volume 51

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Spectrophotometric Method for the Determination of Copper (II) in Leafy Vegetable, Soil, Alloys and Pharmaceutical Samples Using 3-Methylthiophene-2-Carbaxaldehyde-3-Thiosemicarbazone (3-MTAT)

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Abstract:

A highly sensitive spectrophotometric method has been developed for the determination of copper (II) using 3-methylthiophene-2-carbaxaldehyde-3-thilosemicarbazone (3-MTAT) as an analytical reagent. The 3-MTAT forms reddish brown species of copper (II) at a pH range of 5.0-7.0. The Cu (II)-3-MTAT complex shows maximum absorbance at 430 nm, with molar absorptivity and Sandell’s sensitivity being 1.6 x 104 L Mol-1 Cm-1 and 3.6 x 10-3 μg cm-2 respectively. The system obeys Beer’s law in the range of 0.35-3.53mg/L. The regression coefficient of the Beer’s law straight line is 0.338, and the correlation coefficient is 0.999. The detection limit of the method is 0.021 μg mL-1. Most of the common metal ions generally found associated with copper do not interfere. The repeatability of the method was checked by finding the relative standard deviation. The developed method has been successfully employed for the determination of copper (II) in leafy vegetable and pharmaceutical samples and this method was inter comparison of experimental values using AAS.

Info:

Periodical:
International Letters of Chemistry, Physics and Astronomy (Volume 51)
Pages:
105-114
DOI:
10.18052/www.scipress.com/ILCPA.51.105
Citation:
G. S. Reddy and P. R. Reddy, "Spectrophotometric Method for the Determination of Copper (II) in Leafy Vegetable, Soil, Alloys and Pharmaceutical Samples Using 3-Methylthiophene-2-Carbaxaldehyde-3-Thiosemicarbazone (3-MTAT)", International Letters of Chemistry, Physics and Astronomy, Vol. 51, pp. 105-114, 2015
Online since:
May 2015
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