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Simultaneous determination of copper and iron in automotive gasoline by X-ray fluorescence after pre-concentration on cellulose paper
- Source :
-
Talanta . May2007, Vol. 72 Issue 3, p1073-1076. 4p. - Publication Year :
- 2007
-
Abstract
- Abstract: This paper proposes an alternative analytical method using energy dispersive X-ray fluorescence (EDXRF) to determine Fe and Cu in gasoline samples. In the proposed procedure, samples were distilled and the distillation residues were spotted on cellulose paper disk to form a uniform thin film and to produce a homogeneous and reproducible interface to the XRF instrument. The disks were dried at 60°C for 20min and copper and iron were determined directly in the solid phase at 6.40 and 8.04keV, respectively. The calibration curves showed linear response in the 20–800μgL−1 concentration range of each metal. The precisions (repeatability) calculated from 15 consecutive measurements and defined as the coefficient of variation of solutions containing 100μgL−1 of Fe and Cu were 7.8 and 8.1%, respectively. The limits of detection (LOD), defined as the analyte concentration that gives a response equivalent to three times the standard deviation of the blank (n =10), were found to be 10 and 15μgL−1 for Fe and Cu, respectively. The proposed method was applied to copper and iron determination in gasoline samples collected from different gas stations. [Copyright &y& Elsevier]
- Subjects :
- *THIN films
*SEPARATION (Technology)
*GLUCANS
*ANALYSIS of variance
Subjects
Details
- Language :
- English
- ISSN :
- 00399140
- Volume :
- 72
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Talanta
- Publication Type :
- Academic Journal
- Accession number :
- 24862845
- Full Text :
- https://doi.org/10.1016/j.talanta.2006.12.042