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Vol. 27 No. 4 (2015): Vol 27 Issue 4

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Spectrophotometric Determination of Copper(II) Using 1-(2-Pyridylazo)-2-naphthol in Micellar Solution of Cetyltrimethyl Ammonium Bromide

https://doi.org/10.14233/ajchem.2015.17937
G. Afshan Soomro
Department of Chemistry, Shah Abdul Latif University, Khairpur-66022, Sindh, Pakistan; Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia-23284-2006, USA
G. Abbas Shar
Department of Chemistry, Shah Abdul Latif University, Khairpur-66022, Sindh, Pakistan;Department of Crop Physiology, Sindh Agriculture University, Tandojam-70060, Pakistan

Corresponding Author(s) : G. Abbas Shar

gabbas.shar@salu.edu.pk

Asian Journal of Chemistry, Vol. 27 No. 4 (2015): Vol 27 Issue 4

Abstract

A simple rapid new spectrophotometric method has been developed for the determination of copper at trace level using 1-(2-pyridylazo)-2-naphthol (PAN) in cationic micellar solution of cetyltrimethyl ammonium bromide (CTAB). The present method with the use of micellar system replaces the previous solvent extraction method, which reduces the cost and toxicity, while enhancing the sensitivity, selectivity and the molar absorptivity. The average molar absorption coefficient and Sandell's sensitivity was found 2.45 × 104 L mol-1 cm-1 and 2.6 ng cm-2 at lmax 559 nm. Beer's law linear calibration graph was obtained over the concentration range from 0.12 to 5.0 μg mL-1, the stoichiometric composition of the chelate was 1:2 (Cu:PAN). The developed method was successfully applied for the determination of copper from alloys and real samples.

Keywords

Spectrophotometric Copper 1-(2-Pyridylazo)-2-naphthol Micellar Cationic Cetyltrimethyl ammonium bromide
Afshan Soomro, G., & Abbas Shar, G. (2015). Spectrophotometric Determination of Copper(II) Using 1-(2-Pyridylazo)-2-naphthol in Micellar Solution of Cetyltrimethyl Ammonium Bromide. Asian Journal of Chemistry, 27(4), 1361–1364. https://doi.org/10.14233/ajchem.2015.17937
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