Abstract
Existing procedures for 230Th dating of phosphate-rich materials (bone, teeth) are labor-intensive and troubled with variable, operator-dependent results. A liquid-liquid extraction procedure was developed, using a long-chained quaternary ammonium salt as the organic extractor. Quantitative separation of U and Th with chemical yields of 80–90% are attainable, at a tolerance of up to 200 g Ca 3(PO 4) 2 per litre dissolved sample. Liquid-liquid extraction is very fast, and appears not to produce any bias on the resulting dates, as compared with the more time-consuming ion-exchange chromatographic methods in common use. The technique also works well on conventional material, like carbonate fossils and speleothems.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
