weekend [43]. This implies that excretion is fairly rapid, and this is
supported by intratracheal studies in rats [44] and hamsters [45],
where whole-body clearance of administered arsenate or arsenite
occurred with a half-time of 1 day or less. However, the study in
rats [44] found that the clearance was biphasic, with 95% cleared
with a half-time of 29 minutes and the remaining arsenic cleared
with a halftime of 75 days