期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 98, 期 -, 页码 54-59出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2014.06.001
关键词
Hollow fiber-solid phase microextraction; Multivariate optimization; Trace metals; Diesel; Gasoline
类别
资金
- Sasol [IF 021/11-3]
- NRF [SFH20110713000020772]
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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