Subject: | |
From: | |
Reply To: | |
Date: | Mon, 23 Jun 1997 11:51:10 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
Dear list members,
I would be interested in hearing from anyone who is or has been using
guanadine hydrochloride as a reagent for determining oxygen isotopes in
water.
Starting off with an internal lab standard of milli-Q water, we have found
that our 45/44 ratios are huge - giving delta 13C of well over +150 when
run against TS limestone (but no doubt contaminating the reference gas so
these values are probably too low). These ratios could be real and a
consequence of the manufacturing process of GuHCl (the batch of GuHCl I
have was purchased from Aldrich), or there is an (hydrocarbon?) isobaric
interference on mass 45.
Have other people found something similar, and if these high 45/44 ratios
are real, what sort of reference gas was used to get decent analyses?
thanks in advance,
Linda Godfrey
_____________________________________________________
Linda Godfrey
Department of Geological Sciences tel (607) 255 0058
Cornell University fax (607) 254 4780
Ithaca, NY 14853 [log in to unmask]
_____________________________________________________
|
|
|