With silicon based oils, is  there not  the possibility of generating SiF4
gas?
Roy Krouse

----- Original Message -----
From: "Haraldur R. Karlsson" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, January 30, 2001 2:21 PM
Subject: Re: pumps and fluorination lines


> >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