Please visually inspect your samples and remove any rootlets or other signs of physical contamination.Our chemical pretreatment methods will remove post-depositional carbonates as well as humic acids.
Bulk sediment can contain carbon from more than one reservoir and occasionally this can lead to a freshwater reservoir effect, such as in hardwater regions or lakes where old carbon is washed in from the catchment during spring melt or floods.
Having said that, bulk sediment is widely used for radiocarbon dating, especially in cases when macrofossils are unavailable.
For the analysis of bone samples, collagen is extracted.
Always send clean and dry bone samples as damp samples may contain mould which can cause deterioration of the collagen.
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.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.A purchase order is required for for submissions over ,000.A 10% discount will be applied to a single submission of 10 samples or more, or a cumulative project of 10 samples or more where all 10 samples are processed at the same time (same accelerator run, or "wheel").Charcoal samples should be picked out, floated, or sieved from any accompanying sediment.