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Table 2 Mean and range of welding fume characterization parameters as measured during the 60 min welding task at the BZ of the volunteer

From: Increase in oxidative stress levels following welding fume inhalation: a controlled human exposure study

Variable Mean Range
PNC (particles/cm3) 1.69E + 06 8.69E + 05–3.85E + 06
GMD (nm) 45 29–108
Gravimetric mass PM4 (mg/m3) 0.716 0.25–2.29
ROS production potential (nmol/m3) 16.89 0.53–31.2
Elements (mg/m3):   
Al 0.386 0.03–1.233
W 0.205 0.012–0.684
Si 0.074 0.007–0.201
Na 0.019 0–0.049
Mg 0.015 0–0.029
Ce 0.007 0.001–0.018
Fe 0.006 0.002–0.015
  1. Elements reported represent the top most abundant elements present on filters collected at the BZ (w/w concentration >1 %)