At 09:01 PM 4/11/97 -0700, you wrote:
>
> ISOGEOCHEM Digest 386
>
>Topics covered in this issue include:
>
> 1) carbon isotopes in thermal springs - Reply
> by "ROSEN, MICHAEL" <[log in to unmask]>
> 2) kfs-separation
> by [log in to unmask] (Karen Ziegler)
> 3) Re: carbon isotopes in thermal springs
> by [log in to unmask] (Penelope Cooke)
> 4) Email address of P. Le Fort, C.N.R.S. (France)
> by "MR.PROSENIJIT GHOSH" <[log in to unmask]>
> 5) Re: kfs-separation
> by Steve Nelson <[log in to unmask]>
> 6) On Line Furnaces
> by Michael Cheatham <[log in to unmask]>
> 7) Re: On Line Furnaces
> by Henry Schwarcz <[log in to unmask]>
> 8) Re: On Line Furnaces
> by [log in to unmask] (Stephen S. Howe)
> 9) Re: On Line Furnaces
> by [log in to unmask] (Haraldur R. Karlsson)
> 10) Re: On Line Furnaces
> by Henry Schwarcz <[log in to unmask]>
> 11) Re: On Line Furnaces
> by [log in to unmask] (glen martin)
> 12) Tube Crackers
> by Jose Carriquiry <[log in to unmask]>
> 13) Re: Tube Crackers
> by [log in to unmask] (Andrea Lini)
> 14) Re: Tube Crackers
> by Mike Verkouteren <[log in to unmask]>
> 15) On line furnaces
> by Jerry Pulchan <[log in to unmask]>
> 16) Re: Tube Crackers
> by [log in to unmask] (Stephen S. Howe)
> 17) Re: On Line Furnaces
> by [log in to unmask]
> (See attached file: FILE.TXT)
>
>
>Dear isogeochemers,
>
>I am about to separate kfs-OVERGROWTH from Cambrian and Ordovician samples
>from the Appalachian Basin for isotopic analyses ... and I have some
>questions:
>
>1. For heavy liquid separation from the other minerals, mainly qtz
>and plag, I'd like to have the appropriate density beads to make up and
>control the heavy liquids. Our old set of density beads in incomplete,
>and we cannot find any address of any supplier or so. We have searched in
>all catalogues and the net. Our old set is from "Rayners", made in Great
>Britain. Does anybody know of any supplier of density beads ? Or do you
>have any of them sitting around in your lab and you don't need them any
>more ??? We need beads between 2.2 and 3.0.
>
>2. I've been reading about the general mineral separation procedures,
>and the overgrowth techniques in particular, - some people use the sodium
>pyrosulfate fusion to get rid of all moneral BUT qtz and fsp, wheras some
>others don't. However, I cannot find any quote or reference about the
>temperature at which this fusion should take place. I read/was told
>different things:
>(a) that I have to go to temp. of > 800 deg C, because only then SO3
>forms from the reagent, and the SO3 then can react withm and destroy
>minerals such as mica;
>(b) that temps of around 300 deg C are sufficient, i.e. high enough to
>make the salt crystals melt;
>(c) that I shouldn't even think of thinking about using this thechnique
>if I'm after the kfs-overgrowth;
>Some say to never use temperatures higher than 50 deg C during the whole
>procedure of separation, in order to not affect the del18O value of the
>kfs - whereas others go to temperatures of several hundreds of deg C.
>And I also was told that temps up to 300 deg C would not affect the del18O
>value of ksf, ...
>
>... so - I'm confused, and I'd like to ask for your help. Any advise,
>comments, experiences, ideas, references, etc. pp. ... are VERY
>WELCOME!!!!!!
>
>
>THANKs very much,
>
>Karen
>
>***********************************************************************
>Dr. Karen Ziegler tel/main office: (++)519-661-3187
>Lab. for Stable Isotope Studies tel/lab: (++)519-661-3881
>Dept. of Earth Sciences fax: (++)519-661-3198
>University of Western Ontario e-mail: [log in to unmask]
>LONDON, Ontario
>Canada N6A 5B7
>
>Home: 415-251 Platts Lane
>LONDON, Ontario
>Canada N6H 4P4
>tel: (++)519-673-5322
>
>
>Isotope greetings from New Zealand
>
>In reply to this, Chris Hendy here at Waikato suggests:
>
>What you are proposing to do is standard practice with
>geothermal geochemists and forms an important part of their exploration
>strategy. I suggest that you contact Graeme Lyon at the Institute of
>Geological and Nuclear Sciences, Lower Hutt, New Zealand. His e-mail
>addrress is "[log in to unmask]"
>
>I hope this helps
>
>Penny
>
>Penelope Cooke
>Department of Earth Sciences
>University of Waikato
>Hamilton
>New Zealand
>
>
>Can any one give me the Email address of Prof.P.Le Fort, C.N.R.S.(France).
>I need to contact him urgently.If email is not avaliable Fax number will
>solve my job.
>
>P.Ghosh
>[log in to unmask]
>
>
>Karen, you might try going into your dept. mineral collection and get a
>ksp and plag crystal large enough to cut/grind into cubes several mm on
>a side. Then I would keep them in a plastic bottle [500 ml?] with
>tetrabromoethane or bromoform. Acetone/heavy liquid can be added in
>small quantities until one cube sinks and the other floats. Quick and
>easy.
>
>
>
>*********************************
>Steve Nelson
>Dept. of Geology
>673 WIDB
>Brigham Young University
>Provo, UT 80602
>
>801-378-8688 voice
>801-378-8143 FAX
>
>"Intel Inside" is a warning label
>**********************************
>
>
>Dear Readers,
>I need to build one (to maybe four) small tube furnaces to be used
>on a vacuum extraction line. They will/should be movable, up and down,
>either held with talon clamps or on lab jacks. I need to reach and
>accurately maintain 550°C with
>them in order to drive water from phosphate samples prior to torching
>off the evacuated tubes. The tubes will be 6 mm OD Qtz. Any suggestions on
>whether to go with a heated metal block, if so how do I heat it (i.e., what
>kind of heating element should be used, and how should it be powered)? Or
>should I use a mullite tube with a heating element wrapped around it, and
>again, what type of heating element do you suggest. We would also like to
>be able to vary the temperatures on these furnaces, in addition 550°C, to
>sometimes run them at 200°C, other times run them at 380°C
>
>TIA
>Mike
>
>******************************************************************************
>
>Michael M. Cheatham
>312 Heroy Geology Laboratory Phone (315)-443-1261
>Syracuse University Fax (315)-443-3363
>Syracuse, NY 13244
>
>email:[log in to unmask]
>http://www.geochemistry.syr.edu/cheatham/Cheatham.HTML
>http://www.geochemistry.syr.edu/cheatham/InstrPages.html
>******************************************************************************
>
>
>We found that you can buy wire-wound ceramic resistors on hollow cores
>which work very well as tube heaters. They are extremely cheap (a few
>bucks a shot) and easily go up to 600 oC.
>
>We used 100 watt, 25 ohm resistors. They eventually burn out because the
>glassy insulation melts and they short. Wrapping them in asbestos tape
>or cement lengthens the life somewhat.
>
>They cost about $10 each.
>
> Henry
>-----------------------------------------------------------------------------
>Prof. Henry Schwarcz Tel: (905)525 9140 x24186
>University Professor
>Dept. of Geology Fax: (905)522 3141
>McMaster University
>Hamilton, Ontario, L8S 4M1 email: [log in to unmask]
>Canada
>-----------------------------------------------------------------------------
>
>
>Mike:
>
>I can describe to you tube furnaces based on a design I used at the USGS
>and improved upon when I was at the University of Vermont. The furnaces
>were designed to be used either for off-line combustion of sulfide and
>sulfate minerals, or in the heating of nickel reaction vessels of a
>conventional silicate fluorination line. They may be used horizontally or
>vertically and the temperature may be varied from ambient to 1200°C. They
>are are probably larger and more expensive than the ones Henry Schwarcz
>describes, but they should last longer. E-mail me directly if interested.
>
>Steve
>
>---------------------------------------------------------------------------
>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
>---------------------------------------------------------------------------
>
>
>>We found that you can buy wire-wound ceramic resistors on hollow cores
>>which work very well as tube heaters. They are extremely cheap (a few
>>bucks a shot) and easily go up to 600 oC.
>>
>>We used 100 watt, 25 ohm resistors. They eventually burn out because the
>>glassy insulation melts and they short. Wrapping them in asbestos tape
>>or cement lengthens the life somewhat.
>>
>>They cost about $10 each.
>>
>> Henry
>>-----------------------------------------------------------------------------
>>Prof. Henry Schwarcz Tel: (905)525 9140 x24186
>>University Professor
>>Dept. of Geology Fax: (905)522 3141
>>McMaster University
>>Hamilton, Ontario, L8S 4M1 email: [log in to unmask]
>>Canada
>>-----------------------------------------------------------------------------
>
>Henry,
>
>That sounds like a good idea - where do you get these?
>
>Hal
>
>Dr. Haraldur R. Karlsson
>Associate Professor
>Department of Geosciences
>and Department of Chemistry and Biochemistry (Joint)
>
>Mailing Address:
>Department of Geosciences
>Box 1053,Texas Tech University
>Lubbock, TX 79409
>USA
>
>
>Phones - (806)-742-3130 Office
> (806)-742-3112 Stable Isotope Laboratory
>
>Fax - (806)-742-0100
>
>world-wide-web: http://www.ttu.edu/~geosc/
>
>
>They're from Ohmite, and we get them from our local electronics
>distributor (Electrosnic in Toronto).
>
>
>
>
>-----------------------------------------------------------------------------
>Prof. Henry Schwarcz Tel: (905)525 9140 x24186
>University Professor
>Dept. of Geology Fax: (905)522 3141
>McMaster University
>Hamilton, Ontario, L8S 4M1 email: [log in to unmask]
>Canada
>-----------------------------------------------------------------------------
>
>
>Regarding tube furnaces,
>
>We have been using nichrome wire and an autotransformer, e.g. a variac
>to heat up to red heat for the last seven years. Our heating units are
>still functioning and none have been replaced up to this point in
>time. I believe the wire size we use is 0.0253 in O.D., but I don't
>know the resistance/foot of wire. I think it is 1.2 ohms/foot.
>
>G.Martin, Water Sciences Lab, 103 NRH, Univ. of Nebraska, Lincoln,NE
>68583-0844
>
>[log in to unmask]
>(402)472-8210 phone
> " " 9599 FAX
>
>
>Dear Isogeochemers,
> I am interested in building, or buying, tube crackers for admitting
>purified gases (produced off line) into the mass spectrometer. I was told
>that they are not sold as single units (i.e., one item in a catalog), but
>that I have to build them using different parts from possibly different
>catalogs. Could any user provide me with some information regarding the
>relevant catalogs and the parts needed to assemble it?. Also, a technical
>paper in the subject would be helpful. I will greatly appreciate any help
>
>Thanks!
>
>Jose Carriquiry
>
>
>
>PLEASE NOTE: NEW USA ADDRESS!
> ,,,
> (o o)
>------------------------------oOO--(_)--OOo--------------------------------
>** **
>** **
>** Dr. Jose D. Carriquiry . **
>** Research Scientist . USA Mailing Address: **
>** Instituto de Investigaciones Oceanologicas . 344 Pomona, Suite #099 **
>** Universidad Autonoma de Baja California . Coronado, CA 92118 **
>** Apartado Postal # 453, C.P. 22,830 . USA **
>** Ensenada, Baja California, Mexico . **
>** . **
>** Tel +(617)44601, ext 123 . **
>** Fax +(617)45303 . **
>** E-Mail: [log in to unmask] . **
>**.......................................................................**
>
>
>Jose,
> Here are three papers describing tube crackers in detail:
>
>D.J. DesMarais and J.M. Hayes, 1976, Tube cracker for opening glass-sealed
>ampoules under vacuum, Analytical Chemistry, 48, 1651-1652
>
>D. Coleman, Tube cracker for opening samples sealed in glass tubes, 1981,
>Analytical Chemistry, 53, 1963-1965
>
>W.E. Caldwell, J.D. Odom, and D.F. Williams, 1983, Glass-sample-Tube
>breaker, Analytical Chemistry, 55, 1175-1176
>
>Cheers,
>Andrea
>
>
>================================================================
>| Dr. Andrea Lini | Stable Isotope Laboratory |
>| Department of Geology | Phone: (802) 656 02 45 |
>| University of Vermont | Fax: (802) 656 00 45 |
>| Burlington, VT 05405 | E-mail:[log in to unmask] |
>| U.S.A. | ISOGEOCHEM list-owner |
>================================================================
>| ISOGEOCHEM URL: http://beluga.uvm.edu/geowww/isogeochem.html |
>================================================================
>(See attached file: FILE.2)
>
>
>Mike, I have designed and assembled furnaces for combustion of sulfate and
>sulfides. The heating element was wound on a piece of hollow ceramic pipe
>(both purchased from Pottery Supply House, Oakville, Ontario - for a few
>bucks), which was secured in a steel housing (insulated), made from steel
>pipes of different diameters (another few bucks). For 550 degrees,
>aluminium pipes may be fine - they are much easier to machine and probably
>cheaper. The entire assembly rests on a lab jack for vertical positioning.
>Please feel free to contact me directly by e-mail for more details. Good
>luck. Jerry Pulchan.
>
>
>Hi Jose!
>
>I use a tube cracker that is a combination of the Coleman (1981) and
>Caldwell et al. (1983) designs (see references previously mentioned by
>Andrea Lini). I buy glass ball-and-socket joints from Kontes and have them
>make some minor modifications (although any glassblower could do it too).
>I have the end of 18/7 ball joint sealed, and a 3-mm-thick, 10-mm-diameter
>fritted glass disk inserted in the 18/9 socket joint. The tube cracker
>accepts 6-mm O.D. glass tubes that are about 170 mm long. The
>ball-and-socket joint is greased with Apiezon L and secured with a pinch
>clamp. The open end of the socket joint is attached to the mass
>spectrometer inlet with an Ultra-torr Cajon connector rather than an Ace
>Thread connector.
>
>E-mail me directly if you are still interested in dimensions and Kontes
>part numbers.
>
>Steve
>
>---------------------------------------------------------------------------
>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
>---------------------------------------------------------------------------
>
>
>Mike and others interested:
>
> I've had many years of reliable service with tube furnaces
>purchased from Leco. These are interfaced with inexpensive temperature
>controllers for step-wise heating experiments. They make a long one and a
>short one. The part
>
>numbers are #507-700 (2"wide x 10"long, 7'16" I.D.) and #507-200 (2"wide x
>5" long, 1/2" I.D.); Leco Corp., 3000 Lakeview Ave, St. Joseph, MI 49085
>USA. 616-
>
>983-5533.
>
>Rick Socki
>NASA-LESC, Mail Code C-23
>2400 Nasa Rd.
>Houston, TX USA
>281-483-9932 [log in to unmask]
>
>_______________________________________________________________________________
>Subject: On Line Furnaces
>Author: [log in to unmask]
>Date: 4/11/97 11:02 AM
>
>Dear Readers,
>I need to build one (to maybe four) small tube furnaces to be used
>on a vacuum extraction line. They will/should be movable, up and down,
>either held with talon clamps or on lab jacks. I need to reach and
>accurately maintain 550=B0C with
>them in order to drive water from phosphate samples prior to torching
>off the evacuated tubes. The tubes will be 6 mm OD Qtz. Any suggestions on
>whether to go with a heated metal block, if so how do I heat it (i.e., what
>kind of heating element should be used, and how should it be powered)? Or
>should I use a mullite tube with a heating element wrapped around it, and
>again, what type of heating element do you suggest. We would also like to
>be able to vary the temperatures on these furnaces, in addition 550=B0C, to
>sometimes run them at 200=B0C, other times run them at 380=B0C
>
>TIA
>Mike
>
>****************************************************************************=
>**
>
>Michael M. Cheatham
>312 Heroy Geology Laboratory Phone (315)-443-1261
>Syracuse University Fax (315)-443-3363
>Syracuse, NY 13244
>
>email:[log in to unmask]
>http://www.geochemistry.syr.edu/cheatham/Cheatham.HTML
>http://www.geochemistry.syr.edu/cheatham/InstrPages.html
>****************************************************************************=
>**=00=00
>FailureReason: Router: Unable to open mailbox file YMLNG5 mail.box: Remote
syste
>responding
>IntendedRecipient: Mark Peters
>
>Content-type: TEXT/PLAIN; NAME=FILE.TXT
>Content-description: 04/12/97
>
>>From: Robert Michener (isogeochem)
>>To: [log in to unmask]
>>Date: Friday 11 April, 1997 7:38 am
>>Subject: carbon isotopes in thermal springs
>>
>>There's a possibility I may get involved in a project characterizing
>>thermal springs. We're planning on measuring DIC, carbon and oxygen
>>isotopes of precipitated minerals, and possibly the organic carbon of
>>deposited calcite.
>>
>>Has anyone ever done any work in this type of system and have any advice
>>(pitfalls, method problems, references)? It seems pretty straightforward,
>>but I thought I'd ask the group!
>
>Dear Robert
>
>We have just collected (in late Feb) water and calcite sinter samples from
>Waikite Hot Springs on the central North Island of New Zealand. Sampling of
>the water is fairly straight forward. Although we are using a method of
weighing
>all of the bottles and reagents before and after sampling to get a good idea of
>DIC. We aren't measuring organic carbon so I can't help on that one. As long
>as the springs aren't boiling normal sampling procedures can be followed.
>
>Unfortunately we haven't gotten any results back yet so I can't say how
>successful we have been. Our research is to determine if the calcite is
forming
>in isotopic equilbrium with the spring waters or if there are kinetic or
biological
>effects from microbes in the calcite. The research is in collaboration
with Brian
>Jones (Univ Alberta) and Robin Renaut (Univ Saskatchewan).
>
>Michael Rosen
>
>Dr. Michael R.Rosen ph: 64-7-374-8211
>Institute of Geological and Nuclear Sciences fax: 64-7-374-8199
>Wairakei Research Centre
>Private Bag 2000, Taupo, New Zealand
>============================================
> email: [log in to unmask]
>============================================
>
>
>Content-type: APPLICATION/OCTET-STREAM; NAME=FILE.2
>Content-description: 04/12/97
>
>Attachment Converted: c:\eudora\attach\FILE.2
>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ping GUAN, Ph.D |e-mail:[log in to unmask] /\ / \
Associate Professor |Ph: (86)(10)62754113 / \/ \
Department of Geology |Fax:(86)(10)62751187 / ^ \
Peking University | /\ / ( ) \
Beijing, 100871 | / \/ ( * ) \
P.R.China | / I \
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
