As far as we can tell the addition of Chromium salts to phosphoric acid is
unecessary. There are many old wifes tails regarding phosphoric acid and
how concentrated it needs to be to work. In fact we really do not know too
much about the entire process which is rather worrying.
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Peter K. Swart
Professor and Chairman MGG
RSMAS
4600 Rickenbacker Causeway,
Miami FL 33149
305 361 4103 (office)
305 361 4912 (lab)
305 361 4632
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