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From: Stephen Clemons <0000134c1fe1acc3-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] wondering where the yellow went
Date: Aug 20, 2020 18:14 UTC
Reply-To:
Stephen Clemons
In-Reply-To:
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchasOn Thu, Aug 20, 2020 at 1:32 PM, Joseph DiVerdi<joseph.diverdi**At_Symbol_Here**COLOSTATE.EDU> wrote:Monona, I'm very curious how and where conservators use this very strong metal chelator in their work. What situations require the removal of metal ions? Can you provide a snapshot? jadv
> From: Monona Rossol <actsnyc**At_Symbol_Here**cs.com>
> Re: wondering where the yellow went
>
> Phytic acid is described in the literature as a yellow to brownish liquid. There is a thread on the American Institute for Conservation's (AIC) forum about art conservators switching away from Sigma's phytic acid more brownish acid to another provider's whose phytic acid is pale yellow. The assumption is the Sigma product has "degraded."
>
> Danged if I have a clue. I just know as vegetarian, I eat more of it than they do. Does anyone out there have a clue what this reagent color difference actually is?
>
> Monona
--
Joseph A. DiVerdi, PhD, MBA
Associate Professor of Chemistry
Colorado State University, Fort Collins, CO, USA
+1.970.980.5868 - http://diverdi.colostate.edu/
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