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"Stephen S. Howe" wrote:

> Yuri:
>
> I have had small mercury diffusion pumps made for me by California Custom
> Glass, a custom glassblower, for several carbonate/sulfide/sulfate
> extraction lines.  I am not sure whether he is still in business as he was
> near retirement age 10 years ago, but the design is basically similar to
> those sold by Kontes, part number 924360-0000 or 924370-0000.  They are
> two-stage mercury diffusion pumps having a vacuum-jacketed mercury vapor
> riser.  For the first one, the pumping speed is 6 L/sec, at an ultimate
> vacuum of 1x10-7 mm, while the second one has a pumping speed of 10 L/sec
> at the same vacuum.  The second one requires 250 mL of mercury.  Kontes
> also makes several small oil diffusion pumps.  Check their web site at
>
> http://www.kontes.com/html/Home.html
>
> for more details.
>
> By the way, I have about 300 mL of native mercury that I have been trying
> to sell for some time.  Any takers?
>
> Steve
>
> Dear Isotopists,
>
> We wish to set up a small diffusion pump in our O2-line, but have no idea
> where to get it. Those of you who use this, did you buy it or made yourself?
> If somebody uses a home-made construction could you so kind to share its
> design with me.
>
> Thank you very much
>
> Yuri
>
> Yuri A.Kostitsyn
> Laboratory of Isotope Geochemistry
> and Geochronology
> IMGRE
> 15 Veresaeva str. Moscow 121357 Russia
> phone/fax:+7 095 951 3755
> [log in to unmask]
>
> ---------------------------------------------------------------------------
> Stephen S. Howe                         Office:  (518) 442-5053
> Dept. of Earth & Atmos. Sciences        Stable Isotope Lab:  (518) 442-4471
> Earth Science 352B                      FAX:  (518) 442-5825
> University at Albany                    E-mail:  [log in to unmask]
> 1400 Washington Avenue        http://www.albany.edu/geosciences/sshowe.html
> Albany, NY  12222-0001      http://www.albany.edu/geosciences/sirmslab.html
> ---------------------------------------------------------------------------

Howe

I'll make it easier for you to sell your mercury.  Anybody who buys your mercury
gets a free mercury diffusion pump.  The catch is that you have to pick it up
yourself....but considering how lousy the weather is in most of the country,
Miami sunshine aint all that bad.  Leo.