Naphion water traps can be found via:

Perma Pure, Inc.
8 Executive Drive
PO Box 2105
Toms River, NJ 08754

-Sharon Billings

_____________________________________
Sharon Alene Billings
Biological Sciences Department
University of Arkansas, Fayetteville
Fayetteville, AR 72701
office 501-575-2227
lab 501-575-7057
fax 501-575-4010

-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]]On
Behalf Of Li-Hung Lin
Sent: Monday, March 27, 2000 6:05 PM
To: [log in to unmask]
Subject: m/z 16 signal


Hi everyone,

I am working on the measurement of dissolved gases using membrane inlet
coupled with quadrupole mass spectrometer. When I pumped the air-saturated
water, the intensity of m/z 16 and 18 were similar but higher than that of
m/z 32 about an order of magnitude. The m/z 2 intensity also increased at
the same time. When I introduced tiny amount of air into the system, the
m/z 16, 18 and 2 all increased about a factor of 2. Supposed air should
have almost no hydrogen and methane (or others with m/z 16), the intensity
of m/z 2 and 16 should not increase. Is it possible that the m/z 18
dissociate to m/z 16 and 2 and some m/z 16 combines each other to form m/z
32? Can anyone help me to explain this?

BTW, does anyone know Nafion water trap?

Thanks a lot.


Li-Hung Lin
----------------------
Li-Hung Lin
Department of Geosciences, Princeton University