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In-home Formation of Halogenated Volatile Organic Compounds (VOCs): Implications for Human Exposure and Indoor Air QualityEPA Grant Number: U915929
Title: In-home Formation of Halogenated Volatile Organic Compounds (VOCs): Implications for Human Exposure and Indoor Air Quality
Investigators: Olson, David A.
Institution: The University of Texas at Austin
EPA Project Officer: Jones, Brandon
Project Period: January 1, 2001 through January 1, 2002
Project Amount: $83,146
RFA: STAR Graduate Fellowships (2001) RFA Text | Recipients Lists
Research Category: Academic Fellowships , Engineering and Environmental Chemistry , Fellowship - Civil/Environmental Engineering
This research project involves the measurement of halogenated volatile organic compound (VOC) emissions from residential dishwashers. Recent studies have shown that drinking water can be an important source of indoor air pollution, and that for many chemicals, a much greater risk is posed when these chemicals are emitted from residential water sources and are inhaled (i.e., relative to risks by ingestion). Ingestion has traditionally been regarded as the most important exposure pathway for these chemicals. Preliminary results indicate that inhalation exposure to chloroform from dishwashers is several times that of ingestion exposure. The objectives of this research project are to: (1) characterize chemical emissions from dishwashers experimentally; and (2) complete an exposure assessment comparing dishwashers with other sources of chlorinated organics.
Liquid and gas samples will be collected for each experiment. All liquid samples will be analyzed using a purge and trap autosampler plumbed to a gas chromatograph (GC) equipped with a mass selective detector (MSD). Gas samples will be collected by drawing headspace air through Tenax™ adsorbent tubes. Gas samples also will be analyzed using a GC/MSD. Other parameters that will be measured include total organic carbon, free and total chlorine, UV-254 absorbance, liquid temperature, air headspace temperature, and pH.