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Biological Monitoring of Occupational Exposure to Different Chromium Compounds at Various Valency States

1984; Taylor & Francis; Volume: 17; Issue: 1 Linguagem: Inglês

10.1080/03067318408076966

1029-0397

Antonio Mutti, C. Pedroni, G Arfini, I Franchini, Carla Minoia, G. Micoli, C. Baldi,

Occupational exposure and asthma

Abstract Chromium concentrations in the air were measured in seven different workroom environments, where exposure to water soluble hexavalent or trivalent compounds was expected. Urinary excretion of chromium was measured before and after the same arbitrarily chosen working day. End-of-shift urinary chromium and its increase above pre-exposure levels were closely related to the concentration of water soluble chromium (VI) in the air. The values corresponding to 50 μg m −3 in the air, which is the current threshold limit value in most countries, were 29.8 and 12.2μg g−1 of creatinine, respectively. Urinary chromium in workers exposed to water insoluble chromates or to water soluble chromic (III) sulphate was definitely higher than that observed in subjects not occupationally exposed to chromium compounds, but it cannot be recommended as short-term exposure test for evaluation of the job-related hazard.