Addendum/correction:
The natural Soda company of Colorado does produce sodium bicarbonate
by solution mining. I was unaware of that before researching
further.............sorry. Here is a link to the analysis of their
Food grade #3 fine powder shows there are indeed contaminants in the
product. In particular I showed my husband the analysis and he noted
the sodium chloride content they list as "possible". The soda ash
mine he worked in also uses solution mining in part, and he was the
"water master" for that for many years. That company had customers
who would not accept product with sodium chloride content of 150 ppm,
and specified it had to be much less than that. He says that salt
(sodium chloride) is a problem in solution mining, and in fact, even
sodium bicarbonate can be a problem in mining Trona via
water/solution, as it coats the ore and prevents it from dissolving.
Note in the analysis that some potentially quite harmful substances
are present in the product, such as arsenic and lead. "Meets
requirement" does not equate to "none", BTW.
http://www.naturalsoda.com/images/NSI%20Food%203.pdf
I am trying to find an analysis of Arm and Hammer baking soda to
compare. But so far, I've seen nothing to change my mind that there
is no reason at all to spend 3 or 4 times as much or even twice as
much on so-called "aluminum free" baking SODA. According to the other
link below, both products meed the USP standard and are 99% "pure" .
I do buy aluminum free baking POWDER, however.
http://www.madehow.com/Volume-1/Baking-Soda.html
(my DH says that he thought FMC closed their small bicarb plant, but
he could be wrong).
sol
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