what syringes do you use to inject the bac water and do you need to change the needle every time you draw and extract the water?
I use 25g 1” needles and 3ml (luer lock) syringes.
I always draw BAC with a fresh needle, inject to reconstitute. draw back into syringe after 15 minutes, remove needle, attach syringe filter, reattach needle.
At that point you either inject filtered solution 1) Ideally into a new ultra-spec vial (pyrogen and particle free per FDA standards, Teflon coated stopper prevents industrial rubber chemicals from leaching into peptide solution, which is common with cheap raw butyl rubber), 2) less ideally but still better than not filtering, into original vial or 3) backfill insulin syringe per dose, so...
