K W Thomas
Affiliation: RTI International
- Testing duplicate diet sample collection methods for measuring personal dietary exposures to chemical contaminantsK W Thomas
Analytical and Chemical Sciences, Research Triangle Institute, Research Triangle Park, North Carolina, USA
J Expo Anal Environ Epidemiol 7:17-36. 1997..The laboratory-measured caloric content of collected foods was an average of 12% (range: -24% to 36%) lower than estimates of energy intake using a food diary and 16% lower than estimated energy expenditure values...
- A device for sampling of human alveolar breath for the measurement of expired volatile organic compoundsJ H Raymer
Analytical and Chemical Sciences, Research Triangle Institute, North Carolina 27709
J Anal Toxicol 14:337-44. 1990..e., adsorption carryover by the device) was measured at the 50-micrograms/m3 level. The data suggest that the device can be used successfully for organic compounds with volatilities greater than that of p-dichlorobenzene...
- Population-based dietary intakes and tap water concentrations for selected elements in the EPA region V National Human Exposure Assessment Survey (NHEXAS)K W Thomas
Research Triangle Institute, Research Triangle Park, North Carolina, USA
J Expo Anal Environ Epidemiol 9:402-13. 1999..Only small percentages of the population exceeded health-based intake reference values or concentrations equal to regulatory levels in water for Pb, As, and Cd...