freedompyro
holmes1880
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Separation of Rebiana and Erythritol
Just curious if anyone here has ever attempted to separate Truvia into it's component ingredients. No real need because Stevia and Erythritol are
available everywhere...
However, I have been reading around and the only method I can find mentioned is to separate them via addition of water and recrystallization. It is
likely that Rebiana A is far more soluble than Erthritol.
Another possibility is that Erthritol may be soluble in alcohol because it is a sugar alcohol?
Edit:
Rebiana: Soluble up to 40% (w/v) in water at 25 "C
Erthritol: The same... Crap...
Hmmm...
[Edited on 8-1-2012 by freedompyro]
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Pulverulescent
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There are question marks over Truvia, BTW!
And iHerb have erythritol!
P
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freedompyro
holmes1880
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You can get Erythritol from amazon or anywhere. Use google shopping and find 10+ places to buy it.
Truvia is the Coca Cola brand stevia/erythritol sweetner. I think Truvia contains somewhere around 30-70% Erythritol. Sometimes Erythritol is listed
first, sometimes after Rebiana.
I'm just curious about purifying it because it's sold everywhere... You don't have to goto a health food store to get it.
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Ozone
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It's rebaudioside-A (I called it "reb-A" or "Reba"), to differentiate it from the other steviol glycosides
see:http://en.wikipedia.org/wiki/Steviol_glycoside.
I have worked with all of these as well as the mogrosides (from Momordica spp. specifically Luo han guo): http://en.wikipedia.org/wiki/Mogroside
In both cases, we used a cationic resin in the calcium form, eluted with water (detected with a DRI) to separate them. This resin would definitely be
able to resolve the glycosides from erythritol (the SEC component of the gel resin strongly retains erythritol over the much larger glycosides--the
ion-exchange-chelation mechanism then separates the individual glycosides).
Honestly, there are likely larger amounts of the stevioside(s) in the EtOH:H2O extracts from the dried Stevia plant (sp. Stevia redaudiana, http://en.wikipedia.org/wiki/Stevia). Perhaps it would be more efficient to start with seed or, better, clones.
Or...I suppose you could just buy it. Or, for the isolation adventure without the horticulture, the crude plant extract is also for sale: http://www.stevia-extract-sweetener.com/
Cheers,
O3
[Edited on 8-1-2012 by Ozone]
-Anyone who never made a mistake never tried anything new.
--Albert Einstein
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