Evaluation of ICP OES with axial or radial views for determination of iodine in table salt

Author(s)

Adriana A. Oliveira ^[1] ; Joaquim A. Nóbrega ^[2] ; Edenir R. Pereira-Filho ^[3] ; Lilian C. Trevizan ^[4]

Affiliation

^[1] Universidade Federal de São Carlos. Departamento de Química - Brasil

^[2] Universidade Federal de São Carlos. Departamento de Química - Brasil

^[3] Universidade Federal de São Carlos. Departamento de Química - Brasil

^[4] Universidade de São Paulo. Centro de Energia Nuclear na Agricultura - Brasil

• Document type: Journal article
• Source: Química Nova; v. 35, n. 7, p. 1299-1305, 2012-00-00.

Abstract

The performance of inductively-coupled plasma optical emission spectrometers with axial and radial views for determination of iodine in table salt was evaluated. Interference and memory effects in nitric acid and water-soluble tertiary amines (CFA-C) media were studied. Based on a factorial experiment, one optimum instrument operational condition for axial configuration, and two optima conditions for radial configuration was established. The ICP OES with axial view was 5-fold more sensitive than the radial view. Both matrix matching and standard addition methods were used for iodine quantification and for most samples, both strategies of calibration led to similar results. Recoveries ranged from 104 to 114%. (AU)

• FAPESP's process: 06/59083-9 - Inductively coupled plasma mass spectrometry: fundamentals and applications
• Grantee: Joaquim de Araújo Nóbrega
• Support Opportunities: Research Projects - Thematic Grants