ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

A simple flow injection spectrophotometric determination method for iron(III) based on O -acetylsalicylhydroxamic acid complexation

Muberra Andac, Adem Asan, and Ibrahim Isildak

Department of Chemistry, Faculty of Science, Ondokuz Mayis University, 55139 Kurupelit-Samsun, Turkey

E-mail: iisildak@omu.edu.tr

Received: 6 June 2008  Revised: 15 October 2008  Accepted: 23 October 2008

Abstract: A simple and rapid flow-injection spectrophotometric method for the determination of iron(III) and total iron is proposed. The method is based on the reaction between iron(III) and O-acetylsalicylhydroxamic acid (AcSHA) in a 2 % methanol solution resulting in an intense violet complex with strong absorption at 475 nm. Optimum conditions for the determination of iron(III) and the interfering ions were tested. The relative standard deviation for the determination of 5 μg L⁻¹ iron(III) was 0.85 % (n = 10), and the limit of detection (blank signal plus three times the standard deviation of the blank) was 0.5 μg L⁻¹, both based on the injection volumes of 20 μL. The method was successfully applied in the determination of iron(III) and total iron in water and ore samples. The method was verified by analysing a certified reference material Zn/Al/Cu 43XZ3F and also by the AAS method.

Keywords: flow-injection analysis - iron(III) -  O-acetylsalicylhydroxamic acid

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-009-0024-8

Chemical Papers 63 (3) 268–273 (2009)