期刊
BIOLOGICAL TRACE ELEMENT RESEARCH
卷 144, 期 1-3, 页码 1381-1393出版社
HUMANA PRESS INC
DOI: 10.1007/s12011-011-9078-x
关键词
Dispersive liquid-liquid microextraction; Solidification of floating organic drop; Flame atomic absorption spectrometry; Preconcentration; Nickel
资金
- Development Foundation of the Department of Education of Hebei Province, People's Republic of China [2007121]
- Research Development Foundation of the Agricultural University of Hebei
A liquid-phase microextraction technique was developed using dispersive liquid-liquid microextraction based on solidification of floating organic drop combined with flame atomic absorption spectrometry, for the extraction and determination of trace amounts of nickel in water samples. Microextraction efficiency factors, such as the type and volume of extraction and dispersive solvents, pH, extraction time, the chelating agent amount, and ionic strength, were investigated and optimized. Under optimum conditions, the calibration graph was linear in the range of 4.23-250 mu g L(-1) with a detection limit of 1.27 mu g L(-1). The relative standard deviation for ten replicate measurements of 10 and 100 mu g L(-1) of nickel were 3.21% and 2.55%, respectively. The proposed method was assessed through the analysis of certified reference water or recovery experiments.
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