It is a good idea and is something I am looking into. Whilst not perfect, you can look at carbon amount in lbs can be helpful with overall particle CADR. nnMost devices on the market are only meant for minor odors and gasses with the need to go for specialist devices with more carbon like IQAir healthpro Plus/GC gas.

It would be great to add VOC testing to your methodology. I spent a lot of time researching devices only to find out most of them do almost nothing for VOCs.