The objective of this study is to estimate the dietary exposure of polychlorinated dibenzo-p-dioxins and dibezofurans (PCDD/Fs) of Korean population via milk and meat using a probabilistic exposure assessment model. Total 319 raw milk and meat samples collected in the period 2006-2008 from nationwide Korea were measured the concentrations of 17 PCDD/Fs. Distributions of dietary exposure of 7 age subgroups to PCDD/Fs from the commodities were estimated probabilistically using Monte Carlo simulations. Dietary exposure groups were divided as lower, medium and high consumer subgroups according to the consumption of each commodity. The amounts of dietary exposures of Korean population subgroups were compared to the provisional maximum tolerable monthly intake (PTMI) recommended by the Joint FAO/WHO Expert Committee on Food Additives and Contaminants (JECFA). The mean PCDD/Fs concentrations in raw milk and meat of beef, prok and chicken were measured as 0.501, and 0.022~0.150pg WHO-TEQ/g, respectively. Dietary exposure of children was significantly higher than that of adults due to their high milk consumption per body weight (BW). Dietary intake of PCDD/Fs of the Korean populations estimated ranged from 0.154 to 1.248 pg WHO- TEQ/kg BW/day for high consumers (the 97.5th percentile) at the upper bound. Dietary intakes of average population of various subgroups were below the half of PTMI, but those of higher consumers were found exceeding or comparable to PTMI at the upper bound level. This study also suggests that the estimated PCDD/Fs concentrations in milk and meat are comparable to those reported in previous studies. Probabilistic assessment model for PCDD/Fs exposure in meat and milk commodities could be used to estimate the exposure of PCDD/Fs in Korean population for the development of risk mangement mesaures for PCDD/Fs in meat and milk.

Hehage production, botanical composition and soil chemical characteristics were investigated Ween new pastures and old pastures during grazing seasons from May 1993 to October 1994, to find out the condition of pastures grazed by horses on Chdu. Dry matte