Serum and urinary vanadium of vanadium-exposed workers.

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Abstract
The environment of V workers was studied. Low V concentrations (0.01-0.04 mg/m3) in the air do not correlate with V serum levels or its urinary excretion. The results suggest that V values in serum and urine samples reflect V absorption because V could not be detected in the urine of referents. In higher V exposure (0.2-0.5 mg/m3), the concentration in the air inhaled remaining unknown due to the use of dust masks, urinary V excretion and serum V level significantly decreased with exposure-free time.