Problems using carbon 14 dating
To obtain a calendar age for the sample, this radiocarbon age needs to be compared against samples of known age by means of a calibration curve using a specially designed computer software application.This application uses a terrestrial calibration curve to calculate the calendar age.The carbon dioxide formed in the combustion stage is heated in the presence of pure lithium metal, which produces lithium carbide.When all of the carbon dioxide has reacted, distilled water is added to the lithium carbide and a chemical reaction occurs, resulting in the production of acetylene gas.The silica glass vials are loaded into the liquid scintillation spectrometer.The C-14 atoms present in the benzene decay at a certain rate.
Tom completed his Ph D at the Waikato Radiocarbon Dating Laboratory.
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The Wairau Bar in Blenheim is one of the oldest archaeological sites in New Zealand.
Fiona is wearing an aspirator because of the carcinogenic properties of benzene.
Special silica glass vials are used to contain the mixture of benzene and PBD.