title: [Determination of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in newsprints and copy papers by HRGC/HRMS].
abstract: The concentrations of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in newsprints and copy papers which included blank and printed paper samples were determined by isotope dilution and high resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS). All of the paper samples collected at random were extracted with organic solvents and the extracts were cleaned up successively by three different chromatographic columns. The results indicated that the total concentrations of PCDD/ Fs in newsprints were higher than those in copy papers, but the total toxicity equivalent (TEQ) values of newsprint samples were lower than those in copy paper samples. In addition, for both papers, the concentrations of PCDD/Fs in printed papers were higher than the blank papers. Moreover, the patterns of PCDD/Fs in newsprint samples and copy paper samples were different. The total international TEQ values of PCDD/Fs in newsprints and printed newsprints were 0.48 ng/kg and 0.61 ng/kg, respectively. Moreover, the total TEQ values of PCDD/Fs in copy paper and printed copy paper samples were 0.74 ng/kg and 0.79 ng/kg, respectively. The recoveries of 13C labeled 2, 3 ,7, 8-substituted PCDD/Fs spiked before extraction into all paper samples were between 49.82% and 131.34%.
authors.affiliation: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116012, China. qzhang@dicp.ac.cn
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Yang
authors.forename: Jiping
authors.initials: J
authors.lastname: Chen
authors.forename: Wenzhong
authors.initials: W
authors.lastname: Wu
authors.forename: Xinmiao
authors.initials: X
authors.lastname: Liang
authors.forename: Peizhang
authors.initials: P
authors.lastname: Lu
mesh_terms: D001572:Benzofurans / Q000032:analysis*; D000072338:Dibenzofurans, Polychlorinated; D004785:Environmental Pollutants / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010209:Paper; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004785:Environmental Pollutants; D000072317:Polychlorinated Dibenzodioxins