Dear Seth
For a quick way to extract organic matter from shells, you can use
in-situ HCl acidification in silver cups. As for percent of organic
matter, these and their references may help you.
O'Donnell TH, Macko SA, Wehmiller JF
Stable carbon isotope composition of amino acids in modern and fossil
Mercenaria
ORGANIC GEOCHEMISTRY 38 (3): 485-498 2007
O'Donnell TH, Macko SA, Chou J, et al.
Analysis of delta C-13, delta N-15, and delta S-34 in organic matter
from the biominerals of modern and fossil Mercenaria spp.
ORGANIC GEOCHEMISTRY 34 (2): 165-183 2003
Mae A, Yamanaka T, Shimoyama S
Stable isotope evidence for identification of chemosynthesis-based
fossil bivalves associated with cold-seepages
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 245 (3-4): 411-420 MAR
16 2007
Best
Ayumi MAE
---------------------
Geology Ph.D. candidate
Rm 213 Staging Bldg.
Dept. Earth Sciences
University of Western Ontario, London, Ontario, CANADA (N6A 5B7)
On 4-Sep-07, at 7:28 PM, Seth Newsome wrote:
>
>
> Hi All...
>
> Quick question, Im interested in analyzing d15N values of bulk mussel
> shell organics and I was wondering if anyone knew of a "quick and
> dirty" way to prep shells for the EA... I would like to avoid
> hydrofloric acid if at all possible; Im not too worried about
> de-salting after hydrolysis...
>
> Im also curious to know what the average weight percent of organics
> one might expect to extract out of mussel shells?
>
> Any suggestions?
>
> Wombat Boy
>
>
>
> Seth Newsome, Ph.D.
> Carnegie Institution of Washington
> Geophysical Laboratory
> 5251 Broad Branch Road NW
> Washington, DC 20015
> [log in to unmask]
> (202) 478-8987
>
>
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