High temperature combustion produces mostly solid particles in the form of black carbon, or soot, that is somewhat impervious to further pyrolization while lower temperature combustion produces particles with a higher volatile content that pyrolyzes readily producing a significant amplification of particle number concentrations.
We have not, at least not in our project. I agree with your observation but what is your real intention here? In EU regulations the distinction between solid and semi-volatile is based on a specific thermal treatment introduced to decrease sensitivity of PN measurement when including semi-volatiles. As a side effect of this method we see that the volume of these 'solid' particles correlates perfectly with BC concentration. If the purpose of solid particle distinction was different, maybe we used a different method...
Why would you like to pyrolize the particles?
To determine that the particles are a mix of soot and volatiles, a high-temperature Treatment (to evaporate the volatiles) would suffice: weigh the sample prior and post temperature Treatment - the difference being the mass of the voltatiles evaporated...
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