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Highly Selective Catalytic Spectrophotometric Determination of Copper in Water Samples
Asian Journal of Chemistry,
Vol. 22 No. 1 (2010): Vol 22 Issue 1, 2010
Abstract
A simple, rapid and sensitive method has been developed for determination
of trace amounts of copper(II) (1-160 ng mL-1) based on it's
catalytic effect on the oxidation of thionine by hydrogen peroxide in an
alkaline media and in the presence of o-phenanthroline as an activator.
The reaction is monitored spectrophotometrically by measuring the
decrease in absorbance of thionine at 600 nm by the fixed time method.
The detection limit is 0.7 ng mL-1 and relative standard deviation for
ten replicate determinations of 2, 20, 50 and 100 ng mL-1 copper were
1.71, 1.2, 0.98 and 0.75 %, respectively. The proposed method is sensitive,
accurate and tolerant to many foreign substances and all the reagents
used are stable under the conditions. Moreover, the method is easy to
perform for the determination of copper in real samples.
of trace amounts of copper(II) (1-160 ng mL-1) based on it's
catalytic effect on the oxidation of thionine by hydrogen peroxide in an
alkaline media and in the presence of o-phenanthroline as an activator.
The reaction is monitored spectrophotometrically by measuring the
decrease in absorbance of thionine at 600 nm by the fixed time method.
The detection limit is 0.7 ng mL-1 and relative standard deviation for
ten replicate determinations of 2, 20, 50 and 100 ng mL-1 copper were
1.71, 1.2, 0.98 and 0.75 %, respectively. The proposed method is sensitive,
accurate and tolerant to many foreign substances and all the reagents
used are stable under the conditions. Moreover, the method is easy to
perform for the determination of copper in real samples.
Keywords
Kinetic
Spectrophotometric method
Copper determination
o-Phenanthroline
Thionine.
BAGHERI*, H., TABATABAEE, M., KERDEGARI, A., SHAHVAZIAN†, M., & SHISHEHBORE, M. (2009). Highly Selective Catalytic Spectrophotometric Determination of Copper in Water Samples. Asian Journal of Chemistry, 22(1), 661–668. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/16691
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