ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
A simple flow injection spectrophotometric determination method for iron(III) based on
-acetylsalicylhydroxamic acid complexation
Muberra Andac, Adem Asan, and Ibrahim Isildak
Department of Chemistry, Faculty of Science, Ondokuz Mayis University, 55139 Kurupelit-Samsun, Turkey
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) -
Full paper is available at www.springerlink.com.
Chemical Papers 63 (3) 268–273 (2009)