Sampling Artifacts from Conductive Silicone Tubing Page: 1 of 31
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Sampling Artifacts from Conductive Silicone Tubing
1 Sampling Artifacts from Conductive Silicone Tubing
3 A manuscript submitted to Aerosol Science & Technology
5 Michael T. Timko*, Zhenhong Yu, Jesse Kroll, John T. Jayne, Douglas R. Worsnop
6 Richard C. Miake-Lye, and Timothy B. Onasch
8 Center for Aero-Thermodynamics and Center for Aerosol and Cloud Chemistry
9 Aerodyne Research Inc.
10 45 Manning Road, Billerica MA 01821-3976
11 978.663.9500, firstname.lastname@example.org
13 David Liscinsky
14 Combustion Group
15 United Technologies Research Center
17 Thomas W. Kirchstetter and Hugo Destaillats
18 Environmental Energy Technologies Division
19 Lawrence Berkeley National Laboratory, Berkeley, California 94720
21 Amara L. Holder
22 Environmental Health Sciences
23 University of California-Berkeley, Berkeley, California 94720
25 Jared D. Smith and Kevin R. Wilson
26 Chemical Sciences Division
27 Lawrence Berkeley National Laboratory
28 1 Cyclotron Road Mail Stop 6R2100
29 Berkeley, CA 94720-8226
31 Abstract. We report evidence that carbon impregnated conductive silicone tubing used in
32 aerosol sampling systems can introduce two types of experimental artifacts: 1) silicon
33 tubing dynamically absorbs carbon dioxide gas, requiring greater than 5 minutes to reach
34 equilibrium and 2) silicone tubing emits organic contaminants containing siloxane that
35 adsorb onto particles traveling through it and onto downstream quartz fiber filters. The
36 consequence can be substantial for engine exhaust measurements as both artifacts directly
37 impact calculations of particulate mass-based emission indices. The emission of
38 contaminants from the silicone tubing can result in overestimation of organic particle
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Timko, Michael T.; Yu, Zhenhong; Kroll, Jesse; Jayne, John T.; Worsnop, Douglas R.; Miake-Lye, Richard C. et al. Sampling Artifacts from Conductive Silicone Tubing, article, May 15, 2009; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc926147/m1/1/: accessed December 9, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.