EDTA solution becomes slurry

hroychow from nmsu.edu via methods%40net.bio.net (by hroychow from nmsu.edu)
Thu May 28 12:38:37 EST 2009


Are you talking about "slurry" or whitish ppt?  Slurry is quite serious, and you
may have a bad batch of EDTA. However, if you are unable to dissolve the EDTA at
0.5M with the NaOH you have, it may be the NaOH it self.  Make a fresh solution.
 BTW, why use 10N?  If you are making a lot, I would suggest use pellets instead
(calculate the amt you may need and use slightly less than that.

----- Original Message -----
From: Gourvendu Saxena <saxena from nus.edu.sg>
Date: Thursday, May 28, 2009 10:19 am
Subject: EDTA solution becomes slurry
To: methods from magpie.bio.indiana.edu

> 
>   Dear All
>   I am trying to prepare 0.5 M EDTA solution pH 8. I used 10 N 
> NaOH for
>   
> djusting the pH but every time it becomes a white semisolid slurry
>   efore reaching the desired pH. Please forward your suggestions.
>   Thanks
>   Gourvendu
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