Investigation of organic dpm sampling artifacts of a high-volume sampling system.
Liu-Z; Lu-M; Keener-TC; Liang-F
Proceedings of the AAAR 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia. Mount Laurel, NJ: American Association for Aerosol Research, 2004 Oct; :186
Diesel Particulate Matter (DPM) is a complex mixture of organic and inorganic compounds that exist in particle phase. Organic compounds constitute approximately 20%-60% of DPM. Many organic compounds in DPM, such as some PAHs and PAH-derivatives, are considered hazardous to human health and as potential occupational carcinogens and mutagens. In order to provide more accuracy in addressing health risks associated with DPM exposure, it is important to be able to quantify contributions of organic compounds to DPM. Filter collection of organic compounds in DPM is complicated by sampling artifacts caused by adsorption as well as volatilization, and has not much studied for high-volume applications. The main objective of this study is to obtain better understanding of organic compounds sampling artifacts in DPM measurement and examine the limitations of the current sampling technology. The ultimate goal is to develop reliable high-volume sampling methodologies which meet the requirements of effective speciation analysis of organic compounds in ambient DPM exposure in various settings. The study was performed on a Generac diesel generator which serves as a DPM emission source. High-volume sampling systems were used to collect DPM samples in source influenced atmospheres, and thermal analysis methods were used to determine the organic compounds. Quartz pair tandem filters were used to correct adsorption sampling artifacts. Experiments were designed to investigate the nature of adsorption and volatilization sampling artifacts of organic compounds in DPM. Based on the experimental results, the influences of sampling time and filter face velocity on sampling artifacts were discussed.
Particulates; Particulate-dust; Diesel-emissions; Diesel-exhausts; Sampling; Samplers; Sampling-equipment; Sampling-methods; Analytical-processes; Analytical-instruments; Analytical-chemistry
Personal Protective Technology
Proceedings of the AAAR 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia
University of Cincinnati