ISOGEOCHEM Archives

Stable Isotope Geochemistry

ISOGEOCHEM@LIST.UVM.EDU

Options: Use Forum View

Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Simon Sheppard <[log in to unmask]>
Reply To:
Stable Isotope Geochemistry <[log in to unmask]>
Date:
Tue, 27 Jan 1998 15:32:57 +0000
Content-Type:
text/plain
Parts/Attachments:
text/plain (11 lines)
        The cautionary words of Clementi are very important. A plasma
discharge during RF heating can cause very large H-isotope fractionations
(up to 100 per mil or so, if I remember correctly, though often less). It
MUST be avoided. If you have a plasma problem and cannot change the
frequency of your RF generator, see Sheppard & Taylor (1974), Econ. Geol.,
vol. 69, p. 928. They discuss this problem and present a solution for
completely suppressing the discharge, thanks to a hint given to us by Dick
Armstrong in the library at Caltech where Hugh and I were discussing this
problem.
Simon Sheppard

ATOM RSS1 RSS2