I make Liposomal Vitamin C which is also sensitive to higher temperature.
Here is my procedure:
1) Blend for 3-4 minutes sunflower lecithin with distilled water at 120F.
2) Cool that mixture in the fridge until it reaches ~40-50F temperature
3) Dissolve ascorbic acid or ascorbate in cold (40-50F) distilled water
4) Mix the liquids from (2) and (3) and blend for under 1 minute
5a) -- First variant (for smaller ultrasonic tub)
Put the combined mixture (4) into the tub of ultrasonic cleaner together with
a glass jar (or glass) filled with ice and water. Use this jar to stir the emulsion
as it sonificates to keep the temperature 50-60F. . Add more ice into jar when
it melts away.
5b) -- Second variant (for larger ultrasonic tub)
Put the mixture (4) into a thin walled hard plastic or glass container. Add cold tap
water and ice cubes into the ultrasonic tub, then float or set the plastic container in
this water. Add more ice cubes into water between cycles as they melt away.
This can also keep the temperature in the range 50-60F.
Either way, DCA is plenty stable to tolerate those temperatures for 1/2 hour or so
during sonification.
Edited by nightlight, 06 May 2014 - 03:22 AM.