Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 869, Issue 1-2, Pages 101-110Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0021-9673(99)01050-X
Keywords
fullerene adsorbents; adsorbents; fullerenes; organometallic compounds; phenols; polynuclear aromatic hydrocarbons; carbamates; amines
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In this work, the analytical potential of C-60 fullerene as a sorbent for organic and organometallic compounds from aqueous solutions was studied for the first time. Fullerene adsorbs many types of organic substances (e.g., N-methylcarbamates, phenols, polycyclic aromatic hydrocarbons, amines) with efficiencies that depend on the nature of the compound concerned and never exceed 60%. Conventional sorbents such as XAD-2 or polyurethane foam are more efficient than C-60 for this purpose. Organometallic compounds (viz, metalocenes and organoleads) are quantitatively adsorbed on C-60 via the formation of neutral complexes or chelates; the adsorption constant is dramatically increased by the use of classical reagents such as pyrrolidinedithiocarbamate or diethyldithiocarbamate. A complementary comparative study on the adsorption of organometallic complexes on RP-C-18 and silica gel 100, among others, showed C-60 to be superior as sorbent. All experiments in this work were carried out by using continuous flow configurations and gas chromatography-atomic absorption spectrometry techniques. (C) 2000 Elsevier Science B.V. All rights reserved.
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