Water is very effective in leaching the collagen proteins out of the bone, leaving only bone carbonate.
Thus, it’s possible that the bones have very limited collagen.
Bones that have been drilled or powdered prior to submission to the laboratory may not lend themselves to a robust pretreatment that can ensure the accuracy of the results.
We DO NOT recommend that bones be drilled or powdered prior to sending to our laboratory.
Spongy bones like ball and sockets, vertebra, and the like do not tend to preserve well in harsh conditions and may not yield sufficient collagen for AMS dating.
For bird and fish bones, please consult the lab for sufficient sample size.
The pretreatment of non-cremated bone samples starts with the extraction of collagen, which is the material that is dated.