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Radiocarbon dating contamination

Samples used for radiocarbon dating must be handled carefully to avoid contamination. Not all material can be dated by this method; only samples containing organic matter can...

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One of the basic assumptions in carbon dating is that the sample being analyzed has undergone only radioactive decay and has remained unaltered by any other process over the years since it ceased interaction with the biosphere.
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  • SINCE ITS DEVELOPMENT BY WILLARD LIBBY IN THE S, RADIOCARBON 14C DATING HAS...
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  • Libby realized that the residual carbon 14 of some samples would be thus affected and suggested that...
  • Samples used for radiocarbon dating must be handled carefully to avoid contamination....
  • Pretreatment and Contamination
  • Cryo2SoniC method was applied to reduce contamination agents affecting the The radiocarbon dating...

As radiocarbon dates began to prove these ideas wrong in many instances, it became apparent that these innovations must sometimes have arisen locally. This affects the ratio of 14 C to 12 C in the different reservoirs, and hence the radiocarbon ages of samples that originated in each reservoir.

Samples used for radiocarbon dating must be handled carefully to avoid contamination. Radiocarbon dating personnel treat soil samples by wet sieving a slurry; only the fine particles or macrofossils are radiocarbon dated.

Memoirs of the Society for American Archaeology 8: Some examples probably go back 30, years! The surrounding environment can also influence radiocarbon ages.

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Radiocarbon dating contamination

Not all material can be dated by this method; only samples containing organic matter can be tested: The alkali wash is skipped when the sample is not well preserved and further washing will remove all organic substances.

Dates on organic material recovered from strata of interest can be used to correlate strata in different locations that appear to be similar on geological grounds. Two common contaminants are humic acid, which can be removed with an alkali wash, and carbonates, which can be removed with acid.

In some literature, this method is called acid-base-acid ABA.

2 thoughts on “Radiocarbon dating contamination

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