Well I used to do NMR of uranium VI samples many years ago
Thoughts
1. You will almost certainly be dealing with depleted uranium dU, this is a
relatively weak alpha emitter, so direct radiation from the U(VI) won’t
make it out of the tube
2. If you hold a geiger counter upto a bottle of dU nitrate you will get counts
above background from impurities and daughter products
3. Soluble compounds are relatively safe as if breathed in or inhaled they
should get dispersed and excreted
4. Insoluble powders are nasty if they get into the lungs they will lodge and
irradiate a small area of tissue, do I need to say more!
5. Your local rules may vary but I used to work over 'bench kote' lined trays
6. You can get ptfe tube liners and thick walled tubes, not great for resolution
though, but see 7 and 8
7. If you do break a tube in a probe and ship it back to Bruker you will have
to convince them its decontaminated, they will be quite wary
8. A good way to dissolve uranium salts is by addition of a chelator ?EDTA/citrate?
and acidification, uranium (VI) behaves like the lanthanide and transition metals
and forms insoluble gels etc above ~ pH 4 when only simple ions are present.
Though this mayn’t be good for your probe!
9. One way to see U(VI) contamination is a uv light as its salts fluoresce
very nicely and this is a much better way to see small flecks or drips of
material than any sort of counter
Hope this helps and please consult your local health and safety officers!
regards
Gary
Dr Gary S Thompson NMR Facility Manager
CCPN CoI & Working Group Member
Wellcome Trust Biomolecular NMR Facility
School of Biosciences, Division of Natural Sciences
University of Kent, Canterbury, Kent, England, CT2 7NZ
☎:01227 82 7117
✉️: g.s.thompson_at_kent.ac.uk
orchid: orcid.org/0000-0001-9399-7636
On 5 Nov 2024, at 17:29, Kenneth Sharp-Knott <kknott_at_vt.edu> wrote:
Hi Everyone,
I've had a request to perform 1H and 13C NMR on Uranium (VI) containing
complexes. The question is if it is safe or a hazard to the instrument.
I've been provided papers where it is done in relatively standard NMR setups,
and no mention is made of the fact that Uranium is present in the
experimental NMR section.
Does anyone have experience with this?
Best
Ken Sharp-Knott
Manager of Analytical Services and the NMR Facility
Department of Chemistry
Virginia Tech
(540)267-6502 (Cell)
(540)231-0885 (Office)
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Received on Tue Nov 05 2024 - 10:21:32 MST