High-resolution delta O-18 analysis of tooth enamel phosphate by isotope ratio monitoring gas chromatography mass spectrometry and ultraviolet laser fluorination

Authors
Jones, AM Iacumin, P Young, ED
Citation
Am. Jones et al., High-resolution delta O-18 analysis of tooth enamel phosphate by isotope ratio monitoring gas chromatography mass spectrometry and ultraviolet laser fluorination, CHEM GEOL, 153(1-4), 1999, pp. 241-248
Citations number
32
Categorie Soggetti
Earth Sciences
Journal title
CHEMICAL GEOLOGY
ISSN journal
00092541 → ACNP
Volume
153
Issue
1-4
Year of publication
1999
Pages
241 - 248
Database
ISI
SICI code
0009-2541(199901)153:1-4<241:HDOAOT>2.0.ZU;2-O
Abstract
The viability of oxygen isotope analysis of tooth enamel by UV laser ablati on and fluorination has been demonstrated by comparison with the Ag3PO4 ext raction method. In-situ analyses by UV laser fluorination using both isotop e ratio mass spectrometry and isotope ratio monitoring gas chromatography m ass spectrometry (irm-GCMS) microanalysis are comparable to those of the Ag 3PO4 method with a mean precision of +/- 0.4 parts per thousand (1 sigma) f or samples with delta(18)O values ranging from 10.8 to 20.8 parts per thous and. UV laser ablation provides spatial resolution of 100 mu m or less with no laser reaction rim. These data show that irm-GCMS offers a combination of spatial and analytical precision for in-situ sampling of biogenic apatit es previously unobtainable by other means. (C) 1999 Elsevier Science B.V. A ll rights reserved.