期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 82, 期 -, 页码 60-64出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2013.01.003
关键词
Trace analysis; Ionic liquid; Preconcentration; Thin layer; Environmental samples
类别
The paper presents the preconcentration of trace elements via electrodeposition onto a (micro)aluminum cathode in the presence of ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM]EPF6] as a supporting electrolyte. The advantages of the proposed method include very simple instrumentation for the preconcentration of trace elements and low-cost reagents. The experiment showed that the use of ionic liquid in the electrodeposition process significantly improves sensitivity, recovery and detection limits for the determination of trace amounts of iron, cobalt, nickel and zinc. The preconcentrated metals were determined using X-ray fluorescence spectrometry. The optimum parameters for electrodeposition such as pH, the volume of the analyzed solution, the voltage and the deposition time were studied. Under the optimized conditions, the detection limits were 5, 2, 3 and 6 mu g L-1 for iron, cobalt, nickel and zinc, respectively. The precision and recovery of the method were in the range of 3-5.5%, and 92-103%, respectively. The calibration was performed using aqueous standards of Fe(III), Co(II), Ni(II) and Zn(II) in the range 0.01-0.25 mg L-1. The method was applied successfully in water analysis. (C) 2013 Elsevier B.V. All rights reserved.
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