This resource is designed to provide online information concerning the radiocarbon dating method.We hope it will be of occasional use to radiocarbon users and interested students alike.

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A quantity discount of 10% will be applied to submissions of 10 or more samples.

Non-profit refers to Canadian academic and government institutions.

Macrofossils include charcoal, wood, plant, bone, shell, and seeds – not rootlets.

We recommend isolating macrofossils with tweezers or by sieving in distilled, deionized water. Macrofossils (except shell) will undergo the standard AAA pretreatment.

Please consult with us prior to sending wood samples that have been treated with shellac, oil, glue, etc.

In many lacustrine environments, macrofossils are the preferred organic fraction used for dating.Minimum sample sizes are intended for well preserved, clean material.If the sample is too small, it will be submitted for direct combustion. *Ultrafiltration is used to concentrate longer protein molecules and can be used to remove shorter chain proteins more likely to originate from contaminants.The general theory is that humic acids percolate downward and make radiocarbon dates appear younger.However, this is not always the case so it is important to test this method first before pursuing numerous analyses.Bulk peat samples often contain a silty component and a vegetable component. Please remove visible rootlets prior to shipping and do not ship in aluminum foil as it may degrade. Samples will undergo AAA treatment, unless specified otherwise.