An Investigation on the Concentration Efficiencies of Some Macroreticular and Ambersorb Resins Using Radio-Labelled Organic Contaminants Commonly Encountered in Water |
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Authors: | Shi Wei Zhou M. Malaiyandi F. M. Benoit |
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Affiliation: | 1. Analytical Chemistry Section, Institute of Environmental Engineering and Health , 29 Nan Wei Road, Beijing , 100050 , The Peoples' Republic of China;2. Environmental Health Directorate, Health and Welfare Canada, Tunney's Pasture , Ottawa , Canada , K1A 0L2 |
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Abstract: | Abstract The extraction efficiencies of the three commercially available Ambersorb®, carbonaceous, polymeric resins, XE-340, XE-347 and XE-348 were evaluated for their use as sorbents for environmental pollutants using four model, radio-labelled water-borne organic contaminants. Their accumulation behaviour was compared with that of the thoroughly-studied Amberlite®, macroreticular XAD-2 (hydrophobic) and XAD-7 (hydrophilic) resins. These model compounds were desorbed from the resins using known volumes of commonly-used solvents to select the solvent for a particular resin(s). In this preliminary study, at <4 μg/L concentrations of the labelled compounds in aqueous solution (pH 5.78), the order of extraction efficiency of the resins was found to be XAD-2 > XAD-7 > XE-340?-347?-348 for organics. Several inherent impurities originally present in the carbonaceous resins were desorbed by solvents during elution. These resins therefore required exhaustive soxhlet purification prior to use. Most of the impurities were identified by gas chromatography/mass spectrometry. |
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Keywords: | XE-Ambersorb resins solid adsorbents XE-340 XE-347 XE-348 XAD-Amberlite resins XAD-2 XAD-7 radio-labelled compounds lindane fluorene di-2-ethylhexyl phthalate 2,4-dichlorophenol resin impurities trace organics water fortification |
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