A new high-performance chelation ion chromatographic system for the direct determination of trace transition metals in fuel ethanol

Author(s)

Dias, Jailson C. ^[1] ; Kubota, Lauro T. ^[1] ; Nesterenko, Pavel N. ^[2] ; Dicinoski, Greg W. ^[2] ; Haddad, Paul R. ^[2]

Affiliation

^[1] Univ Estadual Campinas, Inst Chem, Dept Analyt Chem, BR-13083970 Campinas, SP - Brazil

^[2] Univ Tasmania, Australian Ctr Res Separat Sci ACROSS, Sch Chem, Hobart, Tas 7001 - Australia

• Document type: Journal article
• Source: ANALYTICAL METHODS; v. 2, n. 10, p. 1565-1570, OCT 2010.
• Web of Science Citations: 15

Abstract

A new chelation ion chromatographic system for the determination of transition metals was developed. The isocratic separation of Fe(2+), Fe(3+) and Cu(2+) simultaneously with Mn(2+), Pb(2+), Cd(2+), Zn(2+) and Ni(2+) was obtained on an iminodiacetic acid (IDA) functionalized silica column 150 x 4.0 mm id. with an optimized eluent composed of 2.5 mmol L(-1) dipicolinic acid, 10 mmol L(-1) HCl and 60% v/v of methanol at flow rate of 0.5 mL min(-1). Post-column reaction with 4-(2-pyridylazo)resorcinol (PAR) was used for sensitive spectrophotometric detection at 510 nm of the separated metals at low ppb level. The applicability of the developed method to the analysis of fuel ethanol was demonstrated. (AU)

• FAPESP's process: 06/03960-1 - Development and validation of method for the simultaneous determination of copper, iron, sodium, nitrate and acetate ions in fuel ethanol using ion chromatography
• Grantee: Jailson Cardoso Dias
• Support Opportunities: Scholarships in Brazil - Doctorate