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Medical extractors looking for a domestic source of 99.5% Instrument grade n-Butane will be gladdened by the latest gas supplier to announce a domestic source at competitive prices, replete with Praxair tests and certifications. 99.99% scheduled next.
You have to buy to own your first LP5 (24lb) or FX1 (120lb) tank, and then continue to swap it out.
Contact J Coltrane for pricing and delivery, at firstname.lastname@example.org.
We sent a sample of Coltrane/Praxair 99.5% Instrument Grade n-Butane to a third party analytical lab to determine the contaminant levels of molecules larger than C-4, ignoring molecules smaller than C-4 because they are not of concern to us for our process.
The lab determined that the parts per million contamination was below their test cut off of 0.2 ppm, so this information was minimally useful.
We subsequently distilled off 10# of it into a new Lp-5 tank, and passed it through a VICI Metronics polishing filter. We noted that after distilling 10# in a 12″ X 12″ recovery pot, that there was only a light film on the inside of the pot, with no droplets or puddles. Sadly, the weight of the oil would be minuscule compared to the weight of the cold trap, so simple weighing is not possible, so we will again rely on a state certified third party forensic lab.
Dropping those off this morning and this time, we will have the remaining virgin n-Butane analyzed using a GCMS to the PPB level, and test the distilled and polished butane to glean empirical results on the efficacy of our process.