![]() ![]() Estimated total daily intake through air and water of the target organics ranged from 0.3 to 12.6 mg, with 1,1,1-trichloroethane at the highest concentrations in both geographic areas. Air was the main route of exposure for all target compounds except the two trihalomethanes (chloroform and bromodichloromethane), which were transmitted mainly through water. The IPI number includes measurements for the level of carbon dioxide in your lungs, your pulse oxygenation, pulse rate and respiration rate. A log-linear relationship between breathing-zone air exposures and concentrations in exhaled breath was suggested for three chemicals: tetrachloroethylene, 1,1,1-trichloroethane, and vinylidene chloride. Personal sampling tubes, driven by a belt-mounted sampling pump, can also sample within the breathing zone, but are less cost-effective and less convenient. MicrostreamTMcapnography monitoring combines four important respiratory measurements into a single number on a scale from 1-10, called the Integrated Pulmonary IndexTMalgorithm (IPI). Air exposures to many VOC varied widely, sometimes over three orders of magnitude, among students on the same campus who had been monitored over the same time period and day. The personal monitor and spirometer proved feasible for collecting abundant quantitative data on most of the 15 target organics. monitors internal calibration coefficients to match data collected. The equipment tested included a personal monitor employing Tenax GC® to collect organic vapors for later analysis by GC-MS, and a specially designed spirometer for collecting samples of expired human breath on duplicate Tenax cartridges. Keywords: air sampling, breathing zone, contaminant dispersion, inhalation, sulfur. ![]() Methods for determining individual exposure to volatile organic compounds (VOC) during normal daily activities were field tested on university student volunteers in Texas and North Carolina. ![]()
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