| View Larger Image | A modified method for diffusive monitoring of 3-ethenylpyridine as a specific marker of environmental tobacco smoke [An article from: Atmospheric Environment] | Digitalby L. Kuusimaki (Author), K. Peltonen (Author), S. Vainiotalo (Author)
| List Price: | $10.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Elsevier | | Page Count: | 10 Pages | | Publication Date: | May 01, 2006 |
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Product Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: A previously introduced method for monitoring environmental tobacco smoke (ETS) was further validated. The method is based on diffusive sampling of a vapour-phase marker, 3-ethenylpyridine (3-EP), with 3M passive monitors (type 3500). Experiments were done in a dynamic chamber to assess diffusive sampling in comparison with active sampling in charcoal tubes or XAD-4 tubes. The sampling rate for 3-EP collected on the diffusive sampler was 23.1+/-0.6mLmin^-^1. The relative standard deviation for parallel samples (n=6) ranged from 4% to 14% among experiments (n=9). No marked reverse diffusion of 3-EP was detected nor any significant effect of relative humidity at 20%, 50% or 80%. The diffusive sampling of 3-EP was validated in field measurements in 15 restaurants in comparison with 3-EP and nicotine measurements using active sampling. The 3-EP concentration in restaurants ranged from 0.01 to 9.8@mgm^-^3, and the uptake rate for 3-EP based on 92 parallel samples was 24.0+/-0.4mLmin^-^1. A linear correlation (r=0.98) was observed between 3-EP and nicotine concentrations, the average ratio of 3-EP to nicotine being 1:8. Active sampling of 3-EP and nicotine in charcoal tubes provided more reliable results than sampling in XAD-4 tubes. All samples were analysed using gas chromatography-mass spectrometry after elution with a 15% solution of pyridine in toluene. For nicotine, the limit of quantification of the charcoal tube method was 4ng per sample, corresponding to 0.04@mgm^-^3 for an air sample of 96 L. For 3-EP, the limit of quantification of the diffusive method was 0.5-1.0ng per sample, corresponding to 0.04-0.09@mgm^-^3 for 8h sampling. The diffusive method proved suitable for ETS monitoring, even at low levels of ETS. |
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