Determination of Polychlorinated Dibenzo-p-Dioxins and Polychlorinated Dibenzofurans in Newsprints and Copy Papers by HRGC/HRMS
高分辨气相色谱/质谱法分析新闻纸和复印纸中的二恶英

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 ()~(13)C labeled 2,3,7,8-substituted PCDD/Fs spiked before extraction into all paper samples were between 49.82% and 131.34%.