African Journal of Chemistry

African Journal of Chemistry ISSN 4391-3199 Vol. 4 (9), pp. 276-279, September, 2017. © International Scholars Journals

Full Length Research Paper

Development of a sensitive spectrophotometeric method for determination of copper

Homayon Ahmad Panahi^1*, Meghdad Karimi¹, Elham Moniri², Hamidreza Soudi¹

¹Department of Chemistry, Islamic Azad University, central Tehran campus, Iran.

²Department of Chemistry, Islamic Azad University, Varamin (Pishva) campus, Iran.

Accepted 05 March, 2017

Abstract

Simple and rapid spectrophotometeric procedure have been established for quantitation of Cu (II).This method is based on the reaction between alizarin red S and boric acid in the solution of pH 8.5 to produce a red complex which place between organic and aqueous phases. In presence of Cu (II), the complex of alizarin red S and boric acid is dissociated and new complex between alizarin red S and metal ions formed which can be measured at the optimum wavelength. All variables were studied to optimize the reaction conditions. Regression analysis of beer’s low plot showed good correlation in concentration range 0.6 - 15 µg.mL^-1. The molar absorptivity and detection limit are calculated. The interference effects of the foreign cation have been examined.

Key words: Extraction, copper, trace elements, water samples, Alizarin red S