Two common contaminants are humic acid, which can be removed with an alkali wash, and carbonates, which can be removed with acid.These treatments can damage the structural integrity of the sample and remove significant volumes of material, so the exact treatment decided on will depend on the sample size and the amount of carbon needed for the chosen measurement technique.Volcanic ash soils (Andosols) may offer great opportunities for paleoecological studies, as suggested by their characteristic accumulation of organic matter (OM).However, understanding of the chronostratigraphy of soil organic matter (SOM) is required.Please contact us to discuss the nature of your research objective to ensure the most appropriate pretreatment of your sediment sample.You are welcome to contact us to discuss the pretreatment or request that we contact you after the pretreatment to discuss options for radiocarbon dating. However, knowing the dry weight will better allow you to estimate the amount of material to send.
However, this can reduce the volume of the sample down to 20% of the original size, so testing of the whole wood is often performed as well.
Saran Wrap) to limit air contact, place them in a Ziplock bag, and ship to us.
– Due to complex soil geochemistry, it may be better to date extracted macrofossils in some circumstances.
The lab starts the analyses immediately upon arrival of the sample so moisture will not induce contamination.
Please remove excess water, wrap the samples with plastic (e.g.