Table 3.

Ranges in percentage of gastric-bioaccessible elemental toxicants measured in different sample types.

Sample type (n samples)	Lead % bioaccessible	Mercury % bioaccessible	Manganese % bioaccessible	Arsenic % bioaccessible (n RL)	Antimony % bioaccessible (n RL)
Processed ores (3)	6–64	0.1–0.9	9.0–43	< 1–2.1 (2)	< 0.05 (3)
Washing, sluicing area soils (2)	45–55	0.3	15–23	< 1–1.9 (1)	0.3–1.4
Village composite soils (2)	6–56	Not analyzed	19–31	< 1 (2)	< 0.05 (2)
Sweep samples (3)	39–58	0.0009–0.2	11.0–41	< 1–1.8 (1)	< 0.05–0.2 (1)
Village outskirt soil (2)	26–66	Not analyzed	6.0–15	< 1 (2)	< 0.05 (2)
Percent bioaccessible = 100 × (ppm leached)/(ppm total in solid), where (ppm leached) = (mg/kg leachate) × (100 kg leachate/1 kg solid). (n RL) indicates number of samples with concentration below analytical detection limit.