Journal
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
Volume 98, Issue -, Pages 54-59Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2014.06.001
Keywords
Hollow fiber-solid phase microextraction; Multivariate optimization; Trace metals; Diesel; Gasoline
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Funding
- Sasol [IF 021/11-3]
- NRF [SFH20110713000020772]
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This study reports a simple and efficient method for the determination of trace Cd, Cu, Fe, Pb and Zn in diesel and gasoline samples by inductively coupled plasma mass spectrometry after matrix removal and analyte preconcentration using hollow fiber-solid phase microextraction (HF-SPME). The optimization of HF-SPME procedure was carried out using two-level full factorial and central composite designs. Four factors (variables), that are, sample solution pH, acceptor phase amount, extraction time and eluent concentration were optimized. Under the optimized experimental conditions, the precision was <= 3% (C = 10 mu g L-1, n = 15), limits of detection and quantification ranged from 0.1 to 0.3 mu g L-1 and 0.3-0.9 mu g L-1, respectively, and the maximum preconcentration factor was 30. The HF-SPME method was applied for the determination of trace metals in real gasoline and diesel samples. (C) 2014 Elsevier B.V. All rights reserved.
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