Fig. 2.
Average concentrations of CO (ppm/10), CO2 (%), HC (ppm), NOx (ppm/10), SO2 (ppm), HRR (W/10) and TPM (mg m−3) from 10% FMC Douglas-fir emissions as measured directly out of the quartz tube. Note the use of %, ppm and scaling by a factor of 10 in order to highlight all species on one graph.