Journal
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Volume 57, Issue 5A, Pages 1035-1041Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jccs.201000144
Keywords
Nickel; Preconcentration; Ionic liquid; Microextraction; Electrothermal atomic absorption spectrometry (ETAAS)
Categories
Funding
- K. N. Toosi University of Technology
- Semnan University Research Council
Ask authors/readers for more resources
A new, simple and highly sensitive dispersive liquid liquid microextraction method using a ionic liquid, i.e., 1-Butyl-3-methylimidazolium hexafluorophosphate ([C4MIM][PF6]) for nickel determination at trace levels in real samples was developed. Nickel was chelated with diethyl dithiocarbamat reagent and extracted into an ionic liquid. Ni was back-extracted from the IL phase with 200 mu L of 0.5 mol L-1 nitric acid and determined by electrothermal atomic absorption spectrometry (ETAAS). Various parameters such as pH, amount of ionic liquid, eluent type and volume, chelating agent concentration, volume of the sample solution and matrix interference effect on the recovery of the metal ions have been studied. Under the optimum conditions, the enrichment factor 100 was obtained from only 20 mL of sample. The calibration graph was linear in the rage of 20-700 ng L-1 of nickel with detection limit of 5 ng L-1. The relative standard deviation (R.S.D.s) for eight replicate measurements of 20 ng L-1 of nickel was 5.6%. Validation of the methodology was performed by standard addition method and analysis of certified reference material. The method was successfully applied to the determination of Ni+2 in serum and tap water samples.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available