Bill,

That method has always worked for me.

I think if you are transferring the test sample more than once you will introduce an opportunity for error. I think it's better to measure out your sample once only into the evaporation chamber. This will give you the exact amounts.

The DII component is so small as to be almost unmeasurable without very sophisticated equipment. You are generally going to be using around 2% or less so the amount in a 100cc sample is 2cc or less. I'm not sure if it separates from the Kero & oil.

If you have a reliable method please let us know.

Regards

Greg