From: Don Bryant (dsbryant@telocity.com)
Date: 02/05/02-06:19:48 AM Z
Eric,
> There was much discussion at the time about this finding.
I'll look that up in the archive.
> From my recollection, it was derived based on B&S ferric oxalate
powder that had been prepared to the liquid state and then altered
additionally with "extra" ingredients.
Is there a difference in the B&S F.O. powder and that which is obtained
elsewhere? I vaguely recall a message by Jeffery Mathias that compared
different F.O. concentrations.
> Some of the discussion was based on the Sp Gr of ferric oxalate. I
can not reflect on that attempt as I have been making my own since 1993.
Is manufacturing F.O. difficult?
> There should be no down side that I recall from adding either of the
two components mentioned. The >oxalic acid is one of the components
that I use to make it and has been written up early text as a offering
preservative properties.
So do you use these additives?
>Some time back I did find that an early batch of ferric oxalate did
precipitate a hard white substance after an addition of EDTA tetra
sodium for which Richard had no insight. I removed it and continued to
use it with no problem.
I assume you mean you removed the percipitate.
Don Bryant
This archive was generated by hypermail 2b30 : 03/08/02-09:45:21 AM Z CST