title: [Determination of polychlorinated dibenzo-p-dioxins and dibenzo-furans in sediment by accelerated solvent extraction, fluid management systems and high resolution gas chromatography/high resolution mass spectrometry].
abstract: A rapid, sensitive and accurate method has been developed for the determination of seventeen 2, 3, 7, 8-substituted congeners of polychlorinated dibenzo-p-dioxins and dibenzo-furans (PCDD/Fs) in sediment using isotope dilution high resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS). Dibenzo-p-dioxins and dibenzo-furans were extracted from samples by accelerated solvent extraction (ASE) and then purified by fluid management systems (FMS) with silica column, alumina column and carbon column. Confirmation and quantitative analysis at pg/g level of PCDD/Fs were performed by HRGC/HRMS using voltage selective ion record (VSIR) mode. Recoveries of fifteen isotopically labeled compound solutions (LCS) and the precision and recovery standards (PAR) were found to be in the range of 49.8% -85.3% and 93.2% - 113.8%, respectively. The detection limits of the method for both 2, 3, 7, 8-tetrachloro-dibenzo-furan (TCDF) and 2, 3, 7, 8-tetrachloro-dibenzo-p-dioxin (TCDD) were determined to be 0.1 pg/g. This method not only meets the requirements of international standards, but also shortens analysis time from 2 weeks to 2 days.
authors.affiliation: Chinese Academy of Inspection and Quarantine, Beijing 100025, China. lixiang@caig.com.cn
authors.forename: Xiang
authors.initials: X
authors.lastname: Li
authors.forename: Yao
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yizhi
authors.initials: Y
authors.lastname: Sun
authors.forename: Weike
authors.initials: W
authors.lastname: Zhong
authors.forename: Yueming
authors.initials: Y
authors.lastname: Qiu
authors.forename: Yanzhang
authors.initials: Y
authors.lastname: Chen
authors.forename: Daning
authors.initials: D
authors.lastname: Wang
mesh_terms: D001572:Benzofurans / Q000032:analysis* / Q000737:chemistry; D002849:Chromatography, Gas / Q000379:methods*; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins / Q000737:chemistry; D005663:Furans / Q000032:analysis / Q000737:chemistry; D057230:Limit of Detection; D013058:Mass Spectrometry / Q000379:methods*; D010938:Plant Oils / Q000737:chemistry*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins; D005663:Furans; D010938:Plant Oils; D000072317:Polychlorinated Dibenzodioxins; C038902:1,4-dioxin; C020887:dibenzo(1,4)dioxin