Figure 6
From: Comparison of stainless and mild steel welding fumes in generation of reactive oxygen species
.OH radical peak heights of midget impinger bubbled samples. Flow rate 3.80 L/min, 20 min collection time. Welding fume was bubbled directly through PBS (pH 7.4), 1 mM H2O2 and 100 mM DMPO. ESR settings were; center field, 3385 G; scan width, 100 G; time constant, 40 msec; scans, 1; modulation amplitude, 1 G; receiver gain, 2.5 × 104; frequency, 9.793 GHz; and power, 63 mW. Asterisks indicate a significant increase in stainless steel fume compared to mild steel fume (P < 0.05)