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- Posts: 5
- Joined: Fri Nov 04, 2016 10:54 pm
Quick question for anyone who has experience working with high pH mobile phases. Any thoughts on how frequently a 5mM pH 9 - 9.5 NH4 bicarb buffered mobile phase lasts before it's no longer useful -- how long it stays good in other words in your experience? Obviously NH4 bicarb buffered mobile phases have a pretty limited shelf life because it's a fairly volatile buffer. If it stays good for up to a week or two that might be acceptable -- if it's only good for a day or two, however, at that point NH4 acetate (the buffer I normally use for that pH) is preferable.
Any thoughts?
Thanks,
WCH