Please indicate on the submision form if you would like stable isotope measurements.For teeth the dentine is most reliable for dating as the enamel exchanges carbon with the environment.
A quantity discount of 10% will be applied to submissions of 10 or more samples.
Non-profit refers to Canadian academic and government institutions.
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.
Physical and chemical pretreatments vary depending on the type of material and the depositional environment from which it came.
It is important to understand the nature of the material being dated as certain organic fractions are more appropriate than others, depending on the environment.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.Researchers sometimes request to date the humic acid (alkali-soluble) and humin (alkali insoluble) fractions of bulk sediment or peat.Below is a list of commonly dated materials, the factors that should be taken into account when selecting material, and the pretreatment methods that the samples will undergo prior to radiocarbon dating.The radiocarbon age of wood corresponds the year the ring grew.This article summarizes the use of accelerator mass spectrometry (AMS) for radiocarbon dating measurements.