In the lab
Dissolving peptides: which solvent for what?
Bacteriostatic water, sterile water or dilute acetic acid. What the difference is, why some peptides refuse to dissolve and what to do then.
Storing peptides: powder, solution and cold chain
What heat, light and thawing do to a peptide, and why powder always keeps longer than a solution.
Reading a certificate of analysis
What belongs on a CoA, what a purity figure does and does not mean, and how to tell whether a certificate belongs to your vial.
Vial, cartridge or pen: what is the difference?
The same substance comes in three packages. The difference is in handling steps, shelf life and in what you can still verify.