Hi everyone,
Tossing in some inorganic context that might be relevant.
Industrial scale electrochemical machining (ECM) facilities rely on large
volumes of buffered electrolyte solutions. The manufacturing process continually
contaminates the solution with aqueous metal waste. That waste undermines the
electrolyte's performance, and is oftentimes poisonous to living organisms. It's
normal to introduce redox agents such as sulfites by the shovel load, thereby
converting many transition metals into less soluble species that can be more
safely filtered.
While electroplating and ECM aren't strictly identical I'd imagine phosphorus
compounds serve a similar role in this case.
Kind regards,
Luke
==
Luke Fulton, PhD
CHEM BLDG R003
NMR Core Facility Director
Unit 3060
COR2E & Department of Chemistry
55 N Eagleville Road
University of Connecticut
Storrs, CT 06279
email: fko24003_at_uconn.edu
(alias): luke.fulton_at_uconn.edu
mobile: (603) 953-5275
Office: (860) 486-4069
________________________________
> From: main_at_ammrl.groups.io on behalf of Andre Simpson via groups.io
> Sent: Sunday, May 5, 2024 9:58 AM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] Help with Mysterious Signals
Hi Everyone,
Thank you so much for your help with this. I am overwhelmed with the response
and help. The NMR community is the best !!!
There are too many people to directly thank….. But in summary
The general consensus seems to be something like this.
Indeed there is a good amount of phosphorous in the sample.
Turns out they use hypophosphite (phosphinate) and/or phosphite, in electroless
nickel plating (thanks Gareth).
The NMR community is so nice !!, I was lost with this for months. I had no
idea some 31P coupling could be so large. We will run 31P next week and
heteronuclear 2D.
Thanks so so much, I really really really appreciate all your time.
Cheers,
Andre
Professor Andre Simpson, PhD, FRSC
Director of the Environmental NMR Center, Founder of TRACES
Department of Chemistry
University of Toronto, Scarborough Campus
1265 Military Trail
Toronto, Canada
M1C 1A4
andre.simpson_at_utoronto.ca
https://www.utsc.utoronto.ca/labs/asimpson/
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Received on Mon May 06 2024 - 06:22:42 MST