Zhu Jiping, Aikawa Bio, Pigeon René
Chemistry Research Division, Safe Environments, Health Canada, Ottawa, Ontario, Canada.
J Air Waste Manag Assoc. 2005 Jul;55(7):978-83. doi: 10.1080/10473289.2005.10464701.
A real-time monitoring methodology to determine diesel fine particles in diesel emissions has been evaluated. The range of particle size captured by the monitor was approximately 0.1 microm to 1 microm. DustTrak real-time monitors were connected to the dilution tunnel of the vehicle exhaust to measure the emissions during the vehicle tests under both dynamic and steady-state driving conditions, and concentration data were recorded every 5 sec. Test variation of the real-time monitoring among different test days was similar to that measured by traditional filter-based gravimetric method, whereas the repeatability of the monitor data within the same-day tests was better than that of gravimetric method. Correlations between the two methods were established for different fuels tested on a single light duty vehicle. When the emissions from the reference fuel was used to convert the monitor's response to diesel fuels, the levels determined by the real-time monitor were consistent with those measured by gravimetric method among different fuels tested. Use of the real-time monitor could provide information on the levels of fine particles that is more relevant to the public health than the total particles.
一种用于测定柴油排放中细颗粒的实时监测方法已得到评估。该监测仪捕获的粒径范围约为0.1微米至1微米。DustTrak实时监测仪连接到车辆排气的稀释风洞，以测量车辆在动态和稳态驾驶条件下测试期间的排放，并且每5秒记录一次浓度数据。不同测试日之间实时监测的测试变化与传统的基于滤膜的重量法测量的结果相似，而同一日内测试中监测数据的重复性优于重量法。针对在一辆轻型车辆上测试的不同燃料，建立了两种方法之间的相关性。当使用参考燃料的排放来转换监测仪对柴油燃料的响应时，实时监测仪测定的水平与不同测试燃料中重量法测量的结果一致。使用实时监测仪可以提供与公众健康更相关的细颗粒水平信息，而不是总颗粒信息。
