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Maybe where you cold precipitated your lipids you could have lost some yield? The rest of it sounds perfect and just like any other tek I have ever seen. Are you going to do a sodium carbonate wash at the end before freeze precipitating?
How much naphtha did you use?
Naphtha seems to have a very big change in solubility with temperature with the DMT fb. Why the freeze precipitation works so well. Always do your naphtha pulls in a hot water bath.
I would say the reason for overcompensation is because most don't really have a clue what is going on. Also HCl loses potency when it has been opened, lye can absorb water from the air, etc. The pH changes with the pulls also, so check between each.
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Last edited by kcmoxtractor; 10-11-09 at 17:43.
Reason: why they overcompensate
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