MadSci Network: Microbiology

Subject: Why does our tetracycline stock precipitate?

Date: Thu Jul 9 06:05:40 2009
Posted by Josh
Grade level: grad (science) School: University of Maine
City: Orono State/Province: ME Country: USA
Area of science: Microbiology
ID: 1247144740.Mi

We typically make up a stock solution of 1mg/mL tet in H20(d) and store at 4C. 
After a few weeks, we see yellow a precipitate at the bottom of the 50mL conical
tube and don't really know why.  We get about three weeks out of a stock
solution, but it would be nice to get a little more shelf-life out of the thing.
 Do you have any idea what we could do to prevent it, or (and frankly more of
interest) why this happens?



Re: Why does our tetracycline stock precipitate?

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