the dead space thing finally clicked for me and I want to write it down
Posting this as a discussion rather than a claim: the dead space thing finally clicked for me and I want to write it down. Why "more water" keeps confusing people, including me for a month. The vial contains a fixed amount of peptide. Water changes nothing about that amount. What it changes is concentration, and…
Yes. Writing 10mg/mL on the vial takes four seconds and removes the entire class of error this board exists to fix.
Small fix — a U-100 syringe is 100 units per mL. If yours is marked differently it is not U-100 and the whole calculation changes.
10mg into 2mL is 5mg/mL, and 0.75mg of that is 15 units
if the maths gives you a fraction of a unit, change the concentration
Agreed on the swirl. There is no reason to shake it and a good reason not to.
aim the stream at the glass wall, not at the cake