[anish7278]

Can anyone suggest me a replacemnet acetate buffer for diafiltration(currently i am using 0.2M ammonium acteate) and also what concentration of buffer would be better for desalting through diafiltration?

[Babcock_Hall]

Can you provide a bit more background on your project.  What is your sample, and under what conditions does it decompose?  Here is a link to a manufacturer whose equipment I have used:
http://www.pall.com/main/laboratory/literature-library-details.page?id=50335