----- Original Message -----
From: "Georges L. Paradis" <[log in to unmask]>
To: "Georges @ Work" <[log in to unmask]>
Sent: Thursday, April 12, 2007 12:14 PM
Subject: Fw: [ISOGEOCHEM] Optimized TCEA test
>
> ----- Original Message -----
> From: "Georges L. Paradis" <[log in to unmask]>
> To: <[log in to unmask]>; <[log in to unmask]>
> Sent: Thursday, April 12, 2007 12:13 PM
> Subject: Re: [ISOGEOCHEM] Optimized TCEA test
>
>
>> Hello Everybody,
>>
>> I am testing the TC/EA parameter modifications described in the reference
>> below and could use some advice. Some parameters of interest include 1)
>> no glassy carbon tube; 2) temp 1270 degC; 3) add nickelized graphite
>> catalyst to every sample 50:50.
>>
>> I have purchased nickelized carbon wool and found that it is difficult to
>> work with. The wool is cut with scissors and then loaded into the
>> capsules. Is there another form of nickelized carbon (possibly granular)
>> available?
>>
>> The paper examines the analysis of phosphates. Do you think these
>> parameters would also apply to carbonates?
>>
>> The paper cites Morrison's Micromass Application Brief AB10. I'm having
>> difficulty locating this. Can anyone provide some clues where one may
>> find this publication?
>>
>> Thank you very much,
>> Georges
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Georges L. Paradis
>> Analytical Lab Manager
>> Marine Science Institute
>> University of California Santa Barbara
>> Santa Barbara, CA 93106
>> 805-893-7182 (ICPMS lab)
>> 805-893-3802 (MSI lab)
>> [log in to unmask]
>> http://msi.ucsb.edu/Analab/
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>>
>> ----- Original Message -----
>> From: "Francois Fourel" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, February 09, 2007 3:37 AM
>> Subject: Re: [ISOGEOCHEM] NBS 30 - TCEA
>>
>>
>>> Hello,
>>> For those who are interested we have recently published a paper on the
>>> topic of oxygen pyrolysis with EA-IRMS.
>>> The reference is:
>>> "High precision determination of 18O/16O ratios of silver phosphate by
>>> EA-IRMS continuous flow technique - C. Lιcuyer, F. Fourel, F. Martineau,
>>> R. Amiot, A. Bernard, V. Daux, G. Escarguel and J. Morrison (2007)
>>> Journal of Mass Spectrometry - 42: pp 36-41."
>>> Some of the aspect we describe may be useful for other types of
>>> minerals.
>>> Hope this helps,
>>>
>>> --
>>> Franηois FOUREL
>>>
>>> UMR CNRS 5125 PEPS
>>> Universitι Claude Bernard Lyon 1
>>> 2 rue Raphaλl Dubois - Bβt. Gιode
>>> F-69622 VILLEURBANNE Cedex - FRANCE
>>>
>>> Tιl : +33 (0) 4 72 44 62 42
>>> FAX : +33 (0) 4 72 43 16 88
>>> Email : [log in to unmask]
>>>
>>> Clemente Recio a ιcrit :
>>>> Dear Darren (and others),
>>>>
>>>>
>>>> I would be very much interested in hearing your experience doing
>>>> mineral samples by EA-pyrolysis, particularly your hydrogen set up and
>>>> results (I assume that the O mentioned refers to the hydration oxygen).
>>>> We attempted long ago to use an EuroVector+Isoprime, but got erratic
>>>> results, so I abandoned. But it would certainly be most helpful to be
>>>> able to do at least Hydrogen ...
>>>>
>>>> Thanks,
>>>>
>>>> Clemente
>>>>
>>>>
>>>>
>>>>> Dear Colleagues
>>>>>
>>>>> Looking through the Isogeochem archives there was a discussion back in
>>>>> 2001 on the dD of NBS 30 (see one such message below). We have been
>>>>> analyzing NBS 30 here using our TCEA and the results compared to our
>>>>> other internal and international standards are not very good. Have I
>>>>> missed some vital information around the community about analyzing NBS
>>>>> 30 for dD and d18O using a TCEA? We are getting good results for dD
>>>>> but not for d18O.
>>>>>
>>>>> Thanks
>>>>>
>>>>> Darren
>>>>>
>>>>>> Subject:
>>>>>> Re: delta D of NBS-30
>>>>>> From:
>>>>>> Willi A. Brand
>>>>>> Reply-To:
>>>>>> Stable Isotope Geochemistry <[log in to unmask]>
>>>>>> Date:
>>>>>> Mon, 10 Sep 2001 08:13:51 +0200
>>>>>> Content-Type:
>>>>>> text/plain
>>>>>>
>>>>>> Hi,
>>>>>> a number of years ago, during the early stages of high temperature
>>>>>> pyrolysis developments at Finnigan I ran NBS30 at the 1-5-milligram
>>>>>> level and got astonishing results. I do not recall the exact numbers
>>>>>> but
>>>>>> I had two distinct cluster values. My conclusion at the time was that
>>>>>> the material was not homogeneous at the single grain level and I
>>>>>> discontinued using it for the purpose. Has anyone experienced
>>>>>> something
>>>>>> similar?
>>>>>> Willi
>>>>>> --
>>>>>>
>>>>>> Willi A. Brand, Stable Isotope Laboratory [log in to unmask]
>>>>>> Max-Planck-Institute for Biogeochemistry
>>>>>> Carl-Zeiss-Promenade 10, 07745 Jena, Germany Tel +49-3641-643718
>>>>>> P.O.Box 100164, 07701 Jena, Germany Fax: +49-3641-643710
>>>>>> http://www.bgc-jena.mpg.de/pages/public/Iso+Gas-Lab/BGC_Gaslab.html
>>>>>> http://www.bgc-jena.mpg.de/pages/public/Iso+Gas-Lab/BGC_Isolab.html
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Dr Darren Grocke
>>>>> Associate Professor & Director of SIBL
>>>>>
>>>>> Stable-Isotope Biogeochemistry Laboratory (SIBL)
>>>>> McMaster University
>>>>> School of Geography & Earth Sciences
>>>>> 1280 Main Street West
>>>>> Hamilton, Ontario, L8S 4K1
>>>>> Canada
>>>>>
>>>>> http://www.science.mcmaster.ca/geo/research/sibl/index.html
>>>>> Phone: 905 525 9140 ext. 26334
>>>>> Fax: 905 546 0463
>>>>
>>>>
>>>>
>>>
>>
>
>
>
|