Dear 林觉, The way you formulated your question is excellent - no problem!
I just had a look at the structure in Wikipedia. I think, in a buffer around neutral pH or a solvent like methanol it should be stable for some time. I would not expose it to sunlight. If there is no information available, I would try to dissolve it in Methanol at eg 10mg/ml and store it at -20. For a quite dilute solution at 25ug/ml, as you write, I'd expect that it would decay after some time, simply because there is not much of the substance in the solution, so it is more likely that small quantities of oxygen etc, destroy quite a lot of it within a short time. Can you obtain any information on stability from the vendor or from papers where the drug was used? If you still have some fresh material available, you might (visually) record and compare UV/Vis spectra of a fresh and an "old" solution of equal concentrations. HTH Wo On Jul 28, 8:28 am, "林觉" <[email protected]> wrote: > Hello, > I used quinpirole (sigma) as the agonist foe the D2 dopamine recepter. My > question is that could the solution of quinpirole (0.025mg/ml) be stable for > one week and at what temperature. > Sorry, my English is not good. do i express my question well? Thank you > for your antention. I'm looking forward to hearing from you soon. _______________________________________________ Methods mailing list [email protected] http://www.bio.net/biomail/listinfo/methods
