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RE: LS Standards -Reply
I have tested a number of quenching agents for the purpose of creating
quench sets. Each quenching agent has varying effectiveness
depending upon the LSC cocktail; however, the chemical that worked the
best for our purposes was Nitromethane. It only required a few drops to
create a large amount of quench so it had little adverse effect on the
cocktail.
Arthur Shanks
Sandia National Labs
ashank@envc.sandia.gov
(505) 848-0121
>>> Wes <vanpelt@ios.com> 04/17/96 06:59am >>>
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Try C-14 labeled toluene quenched with (non-radioactive) acetone.
Wes Van Pelt
vanpelt@ios.com
----------
From: John Harvey[SMTP:harveyj@mcmail.CIS.McMaster.CA]
Sent: Tuesday, April 16, 1996 4:01 PM
To: Multiple recipients of list
Subject: LS Standards
Once again I seek your collective advice.
I wish to purchase H-3 and C-14 standard solutions to make up a set of
quenched standards. My experience is that a sodium carbonate and
formaldehyde standard solution is nothing but trouble.
It would be greatly appreciated if you could let me know of your
experiences with standard solutions from the commercial companies. (I
doubt if we could afford a solution from NIST.) Please send your
comments
directly to me--if you have strong opinions as I do, this could save you
from a libel suit.
Thanking you in advance
John
=======================================================================
John Harvey | McMaster University
Senior Health Physicist | NRB-110
(905) 525-9140 ext 24226 | 1280 Main St. W.
harveyj@mcmail.cis.mcmaster.ca | Hamilton, Ont Canada L8S 4K1
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