Journal
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
Volume 128, Issue -, Pages 17-21Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2016.12.007
Keywords
Electromembrane extraction; Graphite furnace atomic absorption spectrometry; Hg(II)
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Funding
- University of Zanjan Research Council
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The present study proposes the determination of trace Hg(II) using electromembrane extraction followed by graphite furnace atomic absorption spectrometry (GFAAS). Hg(II) migrated from 5 mL of an aqueous donor phase across a thin layer of supported liquid membrane, immobilized inside pores of a hollow fiber, into 10 mu L of an acidic acceptor phase present inside the lumen of the fiber. The final analysis of the extracted Hg(II) performed using GFAAS (350 degrees C and 1400 degrees C for the ashing and atomization temperatures, respectively). Under optimal conditions, Hg(II) was effectively extracted with recoveries in the range of 41-43%, which corresponded to enrichment factors in the range of 102-108. The calibration curve was investigated in the range of 0.5-10 mu g/L and a good linearity was achieved with a coefficient factor of 0.998. Detection limit (3 sigma) was found to be 0.5 mu g/L and repeatability for 5 replicate determinations of three different concentration level of Hg(II) were found to be within the range of 6.2-7.1%. The reliability of the proposed method was examined by analyzing different real waters samples. (C) 2016 Elsevier B.V. All rights reserved.
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