Contamination from electrically conductive silicone tubing during aerosol chemical analysis
Contamination from electrically conductive silicone tubing during aerosol chemical analysis
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DOI：
10.1016/j.atmosenv.2009.02.014
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发表时间：
2009-06
影响因子：
5
通讯作者：
Yong Yu;M. Alexander;V. Perraud;E. A. Bruns;Stanley N. Johnson;M. J. Ezell;B. Finlayson‐Pitts
中科院分区：
文献类型：
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作者：
Yong Yu;M. Alexander;V. Perraud;E. A. Bruns;Stanley N. Johnson;M. J. Ezell;B. Finlayson‐Pitts
在分析空气中的颗粒大小分布和数字浓度时，使用导电硅胶管将采样线上的损失降至最低。我们使用过滤收集的样品的气相色谱-质谱仪(GC-MS)以及颗粒质谱仪来报告来自该油管的污染。导电硅胶和不锈钢管材的比较显示，硅氧烷含量增加只适用于硅胶管材。污染程度随着样品暴露在管道中的长度而增加，随着相对湿度的增加而减少。
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.