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This occurrence can make the samples seem younger than their true age.The degree of contamination affects the magnitude of the inaccuracy in the carbon 14 dating results.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.Natural contamination pertains to the introduction of contaminants to the sample by its surrounding material.For example, bone samples can be contaminated by the presence of limestone or organic acids in the soil (like humic or fulvic acids) where the bones were found.

You are welcome to contact us to discuss the pretreatment or request that we contact you after the pretreatment (and prior to dating).

Labeling of bone samples with animal glue is an example of artificial contamination.

Other contaminants that may be introduced during sample collection and packaging are biocides, conservation chemicals like polyvinyl acetate and polyethylene glycol, cigarette ash, and labels and wrappers that are made of paper.

Learn More Materials such as shells and other materials where a date on the inorganic carbon (carbonate) is to be done typically undergo acid etching before pretreatment.

Learn More The occurrence of contamination can be natural or artificial.

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There are two types of pretreatment usually applied to samples for carbon dating—physical and chemical.