Soil Source Speciation Concentration (mg/kg dw) Test Bioaccessibility Reference Soil 3 mountain types mine waste - 7,8-81 DIN stomach 1,5% stomach and intestine -⁴³ (1) Soil 12 types wood preservatives - 29-39 DIN stomach 2,7-7,6% stomach and intestine - (1) Soil 22 types - - 37-180 DIN stomach and intestine 4-54% (2) Soil 3 types waste and urban impact - 0,5-21 DIN⁴⁴ stomach 17% stomach and intestine 0,6% (1) Soil urban construction waste burning - 4,9-100 Mass-balance stomach 2,2-15% stomach and intestine 2,9-15% (16) Soil urban slag - 2.400 Mass-balance stomach and intestine 34% (5) Soil mountain⁴⁵ - - 39 Mass-balance stomach 3,7% stomach and intestine 3,0% (17) Soil added CrCl₃ Cr(III) 0,33 PBET stomach 37-72% (18) Soil added K₂CrO₄ Cr(VI) 0,33 PBET⁴⁶ stomach 18-46% (18) Soil - - 37-210 PREP stomach and intestine <1% (10) Soil mountain added K₂CrO₄ Cr(VI) 200-400 SBET Stomach 48-108% (19) Soil mountain added K₂CrO₄ Cr(III)⁴⁷ 200-400 SBET Stomach 3,2-14% (19) Soil 35 types added CrCl₃ Cr(III) 740-17.000 SBET Stomach 1,5-35%⁴⁸ (14)