Novel use of a dual-zone restricted access sorbent: normal-phase solid-phase extraction separation of methyl oleate from polynuclear aromatic hydrocarbons stemming from semi-permeable membrane devices

A normal-phase solid-phase extraction (SPE) method was developed utilizing a dual-zone restricted-access sorbent to separate methyl oleate from the 16 US Environmental Protection Agency priority-pollutant polynuclear aromatic hydrocarbons in a hexane matrix. This technique represents a new developme nt in SPE methodology expanding the limited number of available normal-phas e SPE sorbents. While based on a specific application (removal of methyl ol eate from semipermeable membrane device extracts), this cleanup method coul d easily be adapted for other uses requiring the removal/isolation of methy l oleate and potentially related compounds. (C) 2000 Elsevier Science B.V. All rights reserved.