Computer Science
Scientific paper
Sep 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995gecoa..59.3837s&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 59, Issue 18, pp.3837-3841
Computer Science
3
Scientific paper
A simple and precise method of determining the oxygen isotopic composition of Ag 3 PO 4 has been developed in which orthophosphate is condensed to pyrophosphate and higher polymeric forms at elevated temperatures using Br 2 as a reactant in a heated quartz vessel, releasing about 17.5% of the oxygen present as O 2 gas. The O 2 is converted to CO 2 using a heated carbon rod and analyzed using a mass spectrometer. The precision of the 18 O determination is better than 0.07 when reaction furnace temperature is regulated to within ±0.5°C. This method offers advantages of speed, safety, and cost over conventional BrF 5 decomposition of silver phosphate.
Schwarcz Henry P.
Stuart-Williams Hilary Le Q.
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