title: Development of dispersive liquid-liquid microextraction based on solidification of floating organic drop for the determination of trace nickel.
abstract: 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 μg L(-1) with a detection limit of 1.27 μg L(-1). The relative standard deviation for ten replicate measurements of 10 and 100 μg 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.
authors: Hebei Key Laboratory of Bioinorganic Chemistry, College of Science, Agricultural University of Hebei, Baoding, 071001, Hebei, People's Republic of China.
authors: Yukun
authors: Y
authors: Wang
authors: Jingwen
authors: J
authors: Zhang
authors: Bin
authors: B
authors: Zhao
authors: Xin
authors: X
authors: Du
authors: Jingjun
authors: J
authors: Ma
authors: Jingci
authors: J
authors: Li