RE: LS Standards

[Wes <vanpelt@ios.com>]

Try C-14 labeled toluene quenched with (non-radioactive) acetone.

Wes Van Pelt
vanpelt@ios.com

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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