Bioaccessibility of trace elements and chromium speciation in commonly consumed cereals and pulses.

Copper, manganese, and chromium content and their bioaccessibility were
determined in commonly consumed cereals and pulses. Copper, manganese,
and chromium concentration of these grains ranged from 0.19 to 1.22, 0.46 to
8.12, and 0.02 to 0.11 mg/100 g, respectively. Bioaccessibility of these minerals
from the grains ranged from 6.6 to 32.5% (copper), 15.5 to 43.5% (manganese),
and 2.66 to 36.4% (chromium). In terms of bioaccessibility of these minerals,
pulses provided more than cereals. Speciation analysis of chromiumby selective
alkaline method demonstrated the presence of the toxic hexavalent chromium
in lower concentration than trivalent form.