High-resolution dO analysis of tooth enamel phosphate by isotope ratio monitoring gas chromatography mass spectrometry and ultraviolet laser fluorination
نویسندگان
چکیده
The viability of oxygen isotope analysis of tooth enamel by UV laser ablation and fluorination has been demonstrated by comparison with the Ag PO extraction method. In-situ analyses by UV laser fluorination using both isotope ratio mass 3 4 Ž . spectrometry and isotope ratio monitoring gas chromatography mass spectrometry irm-GCMS microanalysis are comparaŽ . 18 ble to those of the Ag PO method with a mean precision of "0.4‰ 1s for samples with d O values ranging from 10.8 3 4 to 20.8‰. UV laser ablation provides spatial resolution of 100 mm 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 apatites previously unobtainable by other means. q 1999 Elsevier Science B.V. All rights reserved.
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