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Contamination from electrically conductive silicone tubing during aerosol chemical analysis
Authors:Yong Yu  M Liz Alexander  Veronique Perraud  Emily A Bruns  Stanley N Johnson  Michael J Ezell  Barbara J Finlayson-Pitts
Institution:1. Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, NY 12201-0509, United States;2. Faculty of Chemistry, Hanoi University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Viet Nam;3. Biochemistry Department, Faculty of Science, Experimental Biochemistry Unit, King Fahd Medical Research Center and Bioactive Natural Products Research Group, King Abdulaziz University, Jeddah, Saudi Arabia;4. Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk-Antwerp, Belgium;5. Environmental Management Program, Environment and Life Sciences Center, Kuwait Institute for Scientific Research, P.O. Box 24885, Safat 13109, Kuwait;6. Environmental and Chemistry Group, Sede San Pablo, University of Cartagena, Cartagena, Bolívar 130015, Colombia;7. Biochemistry Department, Faculty of Science, Experimental Biochemistry Unit, King Fahd Medical Research Center and Production of Bioproducts for Industrial Applications Research Group, King Abdulaziz University, Jeddah, Saudi Arabia;8. Department of Marine Sciences and Convergent Technology, College of Science and Technology, Hanyang University, Ansan, South Korea;9. Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan;10. Department of Zoology, Patna University, Patna, 800 005, India;1. Institute for Chemical and Bioengineering, ETH Zurich, 10 Wolfgang Pauli Strasse, 8093 Zurich, Switzerland;2. Radboud University Medical Centre, Department for Health Evidence (133), P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
Abstract:Electrically conductive silicone tubing is used to minimize losses in sampling lines during the analysis of airborne particle size distributions and number concentrations. We report contamination from this tubing using gas chromatography–mass spectrometry (GC–MS) of filter-collected samples as well as by particle mass spectrometry. Comparison of electrically conductive silicone and stainless steel tubing showed elevated siloxanes only for the silicone tubing. The extent of contamination increased with length of tubing to which the sample was exposed, and decreased with increasing relative humidity.
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