Original scientific paper

https://doi.org/10.5562/cca2066

Evaluation of Matrix Effects of Polycarboxylic Acid Introduction in Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)

Sanda Rončević ; Laboratory of Analytical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Croatia
Lovorka Pitarević Svedružić ; Laboratory of Analytical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Croatia

Abstract

In order to establish prerequisite conditions for hyphenation of inductively coupled plasma–atomic emission spectrometry with liquid chromatography, the effects on plasma signal by loading of low concentrated solutions of tartaric, citric and dipicolinic acid were studied. The intensities of Mn, Li, Mg, Cd and Cu lines were observed in axial and radial signal collection mode. Influences of different ligand concentrations on excitation conditions compared to water were evaluated on the basis of signal–to–background ratio (SBR) and limits of detection (LOD). Lower LOD values were established in the solutions of tartaric and citric acid than in water solution. Higher values were observed in solutions of dipicolinic acid. The Mg II / Mg I line intensity ratio was calculated in order to compare the changes in excitation conditions. Polycarboxylic acid matrices showed slightly departures from equilibrium conditions (≈3 %) in radial observation mode. The effects of polycarboxylic acids monitored on ionic and atomic lines of Cd and Cu were of more complex nature which regards to the type of compound and concentration of the acid solution.(doi: 10.5562/cca2066)

Keywords

ICP–AES; matrix effects; citric acid; tartaric acid; dipicolinic acid

Hrčak ID:

92448

URI

https://hrcak.srce.hr/92448

Publication date:

31.10.2012.

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