Carbon 14 radio carbon dating

Natural contamination pertains to the introduction of contaminants to the sample by its surrounding material.

Any carbon-containing material that affects the carbon 14 content of any given sample is therefore a contaminant.Metal and stones cannot be directly dated unless they have organic materials embedded in them.There is no standard method for pretreatment applicable to all samples for radiocarbon dating.The ratio of normal carbon (carbon-12) to carbon-14 in the air and in all living things at any given time is nearly constant.Maybe one in a trillion carbon atoms are carbon-14.

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