New, high-capacity carboxylic acid functionalized resins for solid-phase extraction of a broad range of organic compounds

Abstract

New high capacity carboxylic acid-functionalized resins, prepared by ring-opening-metathesis suspension polymerization, were used for solid-phase extraction of organic compounds from water. Two resins, exhibiting a capacity range of 3.0 and 3.75 mequiv. COOH/g, respectively, have either been employed in their beaded form or in the form of particle-loaded membranes. A large variety of organic compounds such as phenols, alcohols, aldehydes and ketones, carboxylic acids, esters, chlorinated hydrocarbons, amines, nitrosamines as well as polycyclic aromatic aromatic hydrocarbons were succesfully extracted by these materials. For most compounds, a quantitative recovery was observed. The extraction efficiency of the new resins was compared to those of other, commercially available high-performance materials such as Silicalite and Empore disks. The general advantages of the new materials, the mechanism of extraction, differences between membranes and columns containing the new particles as well as the extraction behavior versus the compounds investigated are discussed.