Radiocarbon dating sample preparation Chatrondom rosyn

Posted by / 28-Nov-2015 13:33

The chemical concentrations, temperature and length of pretreatment vary depending on the sample.

Please note: it may be necessary for the charcoal and wood to be identified to short lived species to avoid problems of inbuilt age. For old wood samples (20,000 BP), we recommend the cellulose fraction be extracted.

These prices include sampling (at Oxford), sample preparation, stable carbon isotope and AMS isotope measurement.

We reserve the right to refuse material for dating if the provenance is uncertain or for other ethical considerations.

A variety of pretreatment procedures are employed at the Waikato Radiocarbon Dating Laboratory to ensure we date only material of secure chemical origins.

All samples are closely inspected to isolate the most reliable fraction for dating.We will perform cellulose extraction and solvent extraction upon request at additional cost.Bone is acid washed in dilute HCl to isolate the bone protein, filtered, then gelatinised to remove contaminants.The sample is treated with sodium chlorite to isolate holocellulose, rinsed, then treated with sodium hydroxide, and rinsed again (solvent extraction may be required depending on sample preservation).The sample is then washed with HCl, rinsed and dried.

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Often a sample may not be homogeneous, or there may be extraneous materials such as rootlets, thread, glue or some other visible contaminant in the sample.