>As Steve has suggested, we're probably going to order an oil diff pump
>backed by a rotary for our new laser fluorination line. However, the main
>worry is contamination of the oil and the prospect of changing oil which is
>contaminated with F. What kind of oils are people using, and how often are
>the oil changes? Someone on this list once mentioned the possibility of
>Fomblin oils - can these be used with regular rotary pumps?
>cheers,
>Jason
>
>*********************************
>Dr. Jason Newton
>University of California Santa Cruz
>Department of Earth Sciences
>Santa Cruz
>CA 95064
>USA
>
>email: [log in to unmask]
>Tel: +1  (831) 459 5751
>Fax: +1  (831) 459 3074

Jason,

Don't some of the modern diffusion pumps use silicon oil?  That
should be inert to fluorine gases.

Regards,

Hal
--
Dr. Haraldur R. Karlsson
Associate Professor
Department of Geosciences
Texas Tech University
Lubbock, TX 79409, USA

phone: 806-742-3130
fax:   806-742-0100