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Very small quantities of datable material are used and it is therefore not such a destructive technique.This allows for the dating of sensitive archaeological material or historical objects like the Turin shroud.
~The value of the standard deviation (or statistical error) applied to 14C dates varies with different dates.
~Such a date can be expressed as follows: 1500 -150 Before Present (BP).
The standard deviation of -150 applied to the above mentioned date indicates that there is a 67% possibility that the correct date for the particular object (organism) falls between 13 Before Present.
This involves the adding of modern carbon to the archaeological carbon sample to be dated.
With the AMS (accelerator mass spectrometry) technique it is now possible to date minute samples - to the extent that a single grain of wheat or a seed can be dated (Renfrew & Bahn 1996).