Pier and others,
I have found in Russian text-book by Galimov (Moscow 1968) that H. Craig
(1954), J. Geol., vol. 62, issue No.2, has given delta-13C range for soft
tissue of marine organisms from -10.7 to -17.9 permil. However I have no
access to that journal to see if he really first defined delta value???
It is interesting that delta-34S appears much later in literature, perhaps
the first papers were by Vinogradov et al (1957), Geokhimia, No.2,183-186,
and by Thode et al. (1961),GCA vol.25,159-174.
There are no delta values in "Isotope Geology" by Kalervo Rankama (London
1954).
All the best,
Stan
At 17:52 06-11-15 +0100, you wrote:
>Dear all,
>
>The simple question was aksed to me: Who started/invented the delta
>notation? And then I realized I do not know for certain. I looked in
>handbooks but and tried internet, but could not trace this fact. My guess
>would be Harmon Graig, but I am far from sure about that.
>Anybody who can inform us about this?
>
>Added to this, some question was asked about terminology as is used in the
>stable isotope community:
>As you know, since few years delta measurements are coming to MC-ICPMS
>(Mg,S, Fe, Zn,...). During my thesis I produced Pb iCRMs for which the
>delta is certified. To my knowledge, for "heavy isotopes", this kind of
>commercial reference materials do not exist as a "pair", but I don't know
>if it is the case for the "light" isotopes?
>[here the good tendency is to have two standard materials with defined =
>absolute values, exactly definig an isotopic scale (eg VSMOW-SLAP scale
>for H- and for O-isotope; NBS19-LSVEC scale for C-isotopes: Pier]
>
>Another thing (that bothers the ICPMSist that I am!), is the use of the
>acronym "IRMS" instead of "GSMS". And "stable isotopes" instead of "light
>isotopes". Because when I am measuring 208Pb/206Pb by MC-ICPMS, I feel
>like I could also say "I am doing stable isotopes measurements by IRMS".
>[even more true for lighter isotopes, such as Ca, Mg, Fe, Zn, Cu,...: Pier]
>..... could you propose to your community to stick to GSMS and light
>isotopes???
>I guess you probably had this debate in the past... [No, I had not..., but
>it is an interesting anglke to look at it; most of used terminology is
>basically tradional/historical; if considering on-line-single inlet
>approaches of measuring, in fact the term IRMS is not completely fitting,
>since we do not compare immediately if we name it this way, also TIMS
>could be named IRMS!!: Pier]
>I like to hear your reaction on this. I think the comment made was not
>without reason ... What do you think?
>
>Best wishes,
>Pier.
>****************************************************************
>Delta Isotopes Consultancy
>
>Dr. Pier A. de Groot
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>
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>
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>The programme can be found
>at:
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>(Click at: Programme > Call-for-Papers/Abstract Submission)
>Isotopes in Geosciences: Instrumentation and Applications [IG]
>
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>Techniques , with a link to the Elsevier web site on the handbook (marked:
>Order Now ):
><http://users.pandora.be/handbook/index.html>http://users.pandora.be/handbook/index.html
>last update: August 15, 2005
>Volume I is now available. Volume II is expected to be available in 2007.
>
>****************************************************************
>Why we are searching for extraterrestrial intelligence
>While we lack it so much on Earth?
>
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>
Dr. Stanislaw Halas
Mass Spectrometry Laboratory
Institute of Physics, UMCS
20-031 Lublin, Poland
phone: +48 81 537-62-75
fax: +48 81 533-36-69
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