Air and biological monitoring were used for assessing external and internal chromium exposure among 116 stainless steel welders (SS welders) using manual metal arc (MMA), metal inert gas (MIG) and tungsten inert gas (TIG) welding processes (MMA : n=57 ; MIG : n=37 ; TIG : n=22) and 30 mild steel welders (MS welders) using MMA and MIG welding processes (MMA : n=14 ; MIG : n=16).
The levels of atmospheric total chromium were evaluated after personal air monitoring.
The mean values for the different groups of SS welders were 201 mug/m3 (MMA) and 185 mug/m3 (MIG), 52 mug/m3 (TIG) and for MS welders 8.1 mug/m3 (MMA) and 7.3 mug/m3 (MIG).
The curve of cumulative frequency distribution from biological monitoring among SS welders showed chromium geometric mean concentrations in whole blood of 3.6 mug/l (95th percentile=19.9), in plasma of 3.3 mug/l (95th percentile=21.0) and in urine samples of 6.2 mug/l (95th percentile=58.0).
Among MS welders, mean values in whole blood and plasma were rather more scattered (1.8 mug/l, 95th percentile=9.3 and 1.3 mug/l, 95th percentile=8.4, respectively) and in urine the value was 2.4 mug/l (95th percentile=13.3).
The analysis of variance of chromium concentrations in plasma previously showed a metal effect (F=29.7, P<0.001), a process effect (F=22.2, P<0.0001) but no metal-process interaction (F=1.3, P=0.25).
Concerning urinary chromium concentration, the analysis of variance also showed a metal effect (F=30, P<0. (...)
Mots-clés Pascal : Chrome, Métal lourd, Toxicité, Acier inoxydable, Acier doux, Soudage, Industrie métallurgique, Exposition professionnelle, Médecine travail, Surveillance biologique, Homme, Condition soudage, Etude comparative, Poste travail
Mots-clés Pascal anglais : Chromium, Heavy metal, Toxicity, Stainless steel, Mild steel, Welding, Metallurgical industry, Occupational exposure, Occupational medicine, Biological monitoring, Human, Welding conditions, Comparative study, Workplace layout
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0489320
Code Inist : 002B03L05. Création : 03/02/1998.