Environmental Protection Agency reference doses

In humans the principal route of exposure to Cd is through tobacco smoke with the net result that smokers have a Cd concentration in blood 4-5 times that of non-smokers [30]. Food is the main secondary source of Cd intake as a result of Cd accumulation in agricultural soils from fertilizers and atmospheric deposition. The Environmental Protection Agency reference dose for Cd in drinking... 

United States Environmental Protection Agency, Reference Dose (RfD) Description and Use in Health Risk Assessments. Background Document 1A (March 15, 1993) internet http //www.epa.gov/iris/rfd.htm. Scientific Committee for Toxicity, Ecotoxicity and the Environment, Opinion on Phthalate migration from soft PVC toys and child-care articles - opinion expressed at the 6th CSTEE plenary meeting, Brussels, 26/27 November 1998, internet http //europa.eu.int/comm/food/fs/sc/sct/outl9 en.html. 

U.S. Environmental Protection Ageitcy (1994). Methods for derivation of inhalation reference conceniration.s and applications of inhalation do.simeiry, EPAy600/8-90/066F, Office of Research and Development, U.S. Environmcnial Protection Agency, Washington, DC. 

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