Wit regard to the cation analysis we published the method sometime in the
last century - there are also more recent publications that used ICP-MS,
but we did very well with ICP-OES - check through the ISOGEOCHEM archives
for more references.
Coleman ML, Walsh JN and Benmore RA (1989) Determination of both chemical
and stable isotope composition in milligramme-size carbonate samples.
Sedim. Geol. 65 233-238.
I will try to find the old publication and update it from papyrus to PDF
and send you a copy off line if I can
Dr. Max Coleman
NASA Jet Propulsion Laboratory, Caltech
Voice (818) 393-6353; Cell (818) 687-7704
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On Aug 24 2013, stableisotopes UCB wrote:
>I have a request to set up for carbonate stable isotope analysis. We
>have a Gas Bench II, without trapping and concentration loops, and a
>Delta Plus XL available with the possibility of using a Delta V if
>necessary. I have not analyzed carbonates before. Samples will
>probably be in the 1mg size range. It seems that a good starting place
>would be to use manually added phosphoric acid to the carbonate sample
>in flushed Exetainers. However, this would appear to generate about 2%
>v/v CO2 in the Exetainer head space, when out Delta Plus XL saturates at
>about 0.3% v/v. Can we dilute with the Gas Bench?
>I am also curious if the residual acidified sample can be used for
>ICP-OES analysis of Mg, Ca, Mn, Fe and Sr. Since this is not typically
>done I assume there is a problem with analyzing samples in a phosphoric
>acid matrix. Any information anyone has would be helpful. This later
>question on ICP is also being sent to the Plasmachem list, apologies for
>Does anyone have recommendations on procedures for this analysis? Any
>advice and/or literature on the subject would be useful.
>Thanks in advance, Paul Brooks.
Max Coleman, Emeritus Professor of Sedimentology
Postgraduate Research Institute for Sedimentology
The University of Reading, Whiteknights, Reading RG6 6AB U.K.
Phone: +(44) 118 931 6627
e-mail: [log in to unmask]