In most techniques calling for a sodium salt, the equivalent potassium salt can be substituted.  Though I am not familiar with the specific technique you are doing, I would try potassium carbonate in lieu of sodium carbonate.

> ----------
> From: 	histonet-bounces@lists.utsouthwestern.edu on behalf of Behnaz Sohrab
> Sent: 	Tuesday, April 1, 2008 1:54 PM
> To: 	histonet@lists.utsouthwestern.edu
> Subject: 	[Histonet] Alzheimer stain
> 
> Question regarding Sodium Carbonate Solution in Bielschowsky method for Alzheimer. Can I substitute Carbonate? Or any one has a better method for this stain? ( I do not have Sodium Carbonate, and no time to order it).
> Thanks,Behnaz
> 
> 
> 
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