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J Environ Sci Health A Tox Hazard Subst Environ Eng

Title:		Dissolved VOC concentrations and salt contents affecting air-sweat equilibrium partition of hydrophilic and hydrophobic VOCs
Author(s):		Cheng WH;
Address:		"Department of Occupational Safety and Hygiene, Fooyin University, Kaohsiung County, Taiwan. PL031@mail.gy.edu.tw"
Journal Title:		J Environ Sci Health A Tox Hazard Subst Environ Eng
Year:		2008
Volume:		43
Issue:		1
Page Number:		98 - 104
DOI:		10.1080/10934520701750223
ISSN/ISBN:		1093-4529 (Print) 1093-4529 (Linking)
Abstract:		"Workers have frequently disregarded long-term dermal exposure to low concentration of gaseous volatile organic compounds (VOCs). To assess dermal exposure risk to gaseous VOCs, equilibrium partitioning coefficients (p(c)) at the air-sweat interface on human skin surface must be examined. This study analyzed the p(c) values of hydrophilic iso-propanol (IPA), methyl ethyl ketone (MEK), and hydrophobic benzene, toluene, ethylbenzene, o-xylene, m-xylene, and p-xylene (BTEXs) at the air-water and air-sweat interfaces at 27-47 degrees C. The hydrophilic VOCs were dissolved in pure water and artificial human sweat liquors at approximately 10-125 mg/L, and hydrophobic VOCs were at approximately 0.55 mg/L. According to experimental results, the dissolved VOC concentration and salt contents simultaneously have a co-effect on p(c) during human dermal exposure to gaseous VOCs. The salt effect resulted in increase of p(c) for hydrophilic and hydrophobic VOCs, and the dissolved VOC concentration effect resulted in a reduction in p(c), which is dominant for hydrophilic compounds of high concentrations of aqueous VOCs. The p(c) data were utilized for further assessment of risk due to dermal exposure to VOCs"
Keywords:		"2-Propanol/*chemistry Air Pollutants/chemistry Butanones/*chemistry Female Humans Hydrocarbons, Aromatic/*chemistry Hydrophobic and Hydrophilic Interactions Male Occupational Exposure Salts/chemistry Skin/metabolism Skin Absorption Solubility Sweat/*chemi;"
Notes:		"MedlineCheng, Wen-Hsi eng Research Support, Non-U.S. Gov't England 2007/12/29 J Environ Sci Health A Tox Hazard Subst Environ Eng. 2008 Jan; 43(1):98-104. doi: 10.1080/10934520701750223"