I wish I had a gas spectometer...
I believe you mean a
mass spectrometer.
As for the wick question, I was using CVS 100% organic cotton balls for about five months up until about a week ago until I got a beautiful shipment of unbleached undyed unmodified hemp fiber in, which absolutely blows cotton out of the water. Wicks faster, lasts longer, harder to burn, tastes better(to me, anyway).
These aren't slacker builds I'm testing the hemp in either, the brass setup is 22g Nichrome 80 @ .15 ohms and the stainless is 24g Nichrome 80 @ .22 ohms - no burnt hit or slow wicking, even with all the empty space below the 22ga build it doesn't starve or dry hit even on 5-7 second lung hits. I'm slightly rolling and pulling the hemp fiber through the coils until it's just snug but not super tight. Kind of fiddly to work with at first but you get used to it, or at least I did.
I'm slowly converting all my devices over from cotton to hemp, it's just working better for me. 4oz of Hemp fiber was ~$10 shipped and for anyone who is keeping track 4oz will last a very long time. ( Hemp Source:
http://bountifulspinweave.com/p/S-NF-H.html#.U-ajs2OTrIN ) - I'm using that straight out of the package and loving every minute!