will edwards on wed 14 feb 01
Hello,
I know we could make some real interesting colors with various materials =
such
as potassium bichromate and all but then we could also learn to work clos=
er to
the available ones that are much less threatening in many ways to our hea=
lth.
I think that hexavalent chromium is being confused with trivalent chromiu=
m in
some way? The term chronic exposure verses an accute toxin and carcinogen=
may
be better understood if someone out there could point me to the right
information regarding trivalent chromium, I was taken to a vitamin supply=
service offering trivalent chromium as a mineral replacement advocating i=
t use
in the human body? However I do remember a good piece of information writ=
ten
on the subject on Insights page by Mr. Basterache. It details the valence=
properties in detail and discusses the potential for such materials in
handeling and use. Good article!
http://digitalfire.com/education/toxicity/chromium.htm
On the other hand the use of di-phenyl carbazide as an indicator would le=
t you
know if as much as 1ppm is available in hexavalent form. (turns Red) then=
of
course sodium bisulfite could be added to the hexavalent chromium in very=
small additions (0.1-0.2 g/l) to rid it of hexavalent chromium. then if y=
ou
have too much you can always get rid of extra amount of bisulfite with
hydrogen peroxide. Should any of those who work in the field can help me =
here,
It would be greatly appreciated. I would love to add that information as
trivalent chromium being a known carcinogen to my records and the source =
this
information is from. That way I can be sure to answer those who ask with =
the
newest information available. It is so hard keeping track of all these
changes. My track record was in manufacturing with some of these and =
apparently much has changed recently.
William Edwards
Alchemy 101 =
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