SDS electrod buffer
Posted 08 December 2004 - 07:44 AM
have troubles with pH of SDS electrod buffer (10x stock). Use 25O mM Tris, 1,92 M glycine, 0,1% SDS, pH 8,3. Now, made new stock, but didnīt work... I measured pH and it was 10,5 and caused that SDS doesnīt work how it should... and, there is written in protocol, don īt adjust pH, itīs 8,3...I also changed mark of chemicals but itīs the same...What happen if I adjust pH (by HCl e. g.)? Do I influence the protein in sample-or????
Can anybody help me?
Thanx a lot! Lenca
Posted 15 December 2004 - 09:53 AM
I use nearly the same buffer for SDS-PAGE and it works well. But my stock solution is only 5x and I don't adjust the pH. If the protocol says you shouldn't adjust the pH then don't do it!
The pH changes when you dilute the buffer. But maybe it works when you use a 5 x buffer.
Posted 16 December 2004 - 08:32 AM
Edited by serglom, 16 December 2004 - 08:33 AM.