AI Article Synopsis
- The study measured the levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in various newsprints and copy papers using advanced chemistry techniques like isotope dilution and high-resolution gas chromatography/mass spectrometry.
- Results showed that newsprints had higher total concentrations of PCDD/Fs than copy papers, yet the total toxicity equivalent values were lower for newsprint compared to copy paper.
- Printed papers contained higher levels of PCDD/Fs than blank samples for both types of paper, with distinct patterns observed between newsprint and copy paper; TEQ values for newsprints ranged from 0.48 to 0.61 ng/kg, while
Article 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%.
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