elements and MMA/SS welding fumes (plants A, B, C, D).
Number of measurements performed; = 60. y = correlation
liney=kx+kfor: Fe 0 112x+ 021;
Mn 0-039x+ 0-006; Ni 0O005x + 0-002;
Cr 0 036x + 0 005.
The variations in concentration of particles
depend on welding parameters and environmental
factors. Working procedures and general and personal
prevention systems have an influence on concentrations
in fumes.
Also, the presence of some other processes applied
in the vicinity affects the chemical composition of the
background: under certain conditions, the background
may significantly affect the fumes collected in
the breathing zone, although usually the background
concentration of fumes measured with stationary
samplers constitutes about one tenth of that found in
the breathing zone.6 17
Relations exist between concentrations of elements
in fumes and distance from the welding area. The
results of our studies indicate that MMA/SS fumes
and their elements are usually more concentrated in