|
Title
Solid-phase extraction of PB from common salt and water samples by cellulose modified with anhydrous EDTA
Authors
YOSHIFUMI AKAMA and TOYOTOSHI UEDA
Received
July 2, 2012
Published
Volume 47 Issue 5-6 May-June
Keywords
EDTA-type chelating cellulose, Pb, solid-phase extraction, preconcentration, common salt
Abstract
A regenerated cellulose fiber functionalized by anhydrous EDTA has been synthesized, then it was employed as a
solid-phase extraction material for preconcentration and determination of trace Pb in common salt and water samples.
The chelating cellulose (Cell-EDTA) was characterized by infrared spectrometry and elemental analyses. In order to
obtain quantitative recoveries of Pb, various analytical parameters, such as pH, amounts of solid-phase, equilibration
rate, sample volume, eluent volume, flow rate etc. were investigated. The effects of some metal ions on the sorption of
Pb were also examined. The maximum sorption capacity of 0.68 mmol/g was obtained. A preconcentration factor 200
(using 2000 mL of sample and 10 mL of eluent) was achieved. The proposed method was applied to determine the trace
amount of Pb in common salt and water samples. The detection limit of Pb was 1.5 µg L-1 as the concentration in 500
mL solution (20-fold preconcentration).
Link
|
