Carbon dating charcoal bone

Rated 4.9/5 based on 761 customer reviews

All air is evacuated from the vacuum line because it has C-14 in it and is a potential contaminant.Then a stream of oxygen is added into the system and the sample is combusted.This gas is then passed through a vanadium-based catalyst column, which produces liquid benzene (C).A scintillator chemical (butyl-PBD) is added to the liquid benzene.Some materials that do not contain carbon, like clay pots, can be dated if they were fired in an oven (burnt) and contain carbon as a result of this.

Special silica glass vials are used to contain the mixture of benzene and PBD.The scintillator chemical butyl-PBD picks up each decay event and emits a tiny flash of light that the spectrometer is programmed to detect and count.In addition to the moa sample, control samples are also measured at the same time.First, the lab will test the bone to see how much protein remains in it, because it’s the protein fraction of the bone that they actually date.Once they know that there is sufficient protein remaining, they clean the surface of the bone to remove contaminants like dirt, charcoal or, in some cases, glue that the archaeologists have used to mend the bone fragments The cleaned bone sample is then ground up into smaller pieces to speed up chemical reaction with the acid in the next stage.

Leave a Reply