title: Monitoring polychlorinated biphenyls in pine needles using supercritical fluid extraction as a pretreatment method.
abstract: This paper reports on the first use of supercritical fluid extraction (SFE) of polychlorinated biphenyls (PCBs) from pine needles. Supercritical carbon dioxide was used as extraction fluid, and exhibited good extraction efficiencies and recoveries (>90%). GC-MS (selected ion monitoring mode) achieved both accurate identification and quantification of the PCBs. Compared with traditional time consuming multi-step sample preparation methods, SFE with carbon dioxide is easier to perform, and is a feasible alternative extraction procedure for the monitoring of PCBs in pine needle samples.
authors.affiliation: Department of Chemistry, and University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
authors.forename: Xue Rong
authors.initials: XR
authors.lastname: Zhu
authors.forename: Hian Kee
authors.initials: HK
authors.lastname: Lee
mesh_terms: D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D028223:Pinus / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000032:analysis*
chemical_list: D011078:Polychlorinated Biphenyls