Researchers were able to use radiocarbon dating on The Bakhshali Manuscript because it was made out of birch bark, an organic material.
However, it was difficult to determine the true age of The Bakhshali Manuscript because the 70 page document is composed of materials from three different time periods.
When the University of Oxford tested the document with their Radiocarbon Accelerator Unit they used three different samples and each sample came from a different century.
One sample came from 885-993 AD, another from 680-779, and the most shocking from 224-383 AD.
University of Leicester archaeologists took four small samples from one of the ribs of the Greyfriars skeleton and sent them to two specialist units with the facilities to analyse them: the Scottish Universities Environmental Research Centre (SUERC) at the University of Glasgow, and the Oxford Radiocarbon Accelerator Unit, part of the University of Oxford’s Research Laboratory for Archaeology and the History of Art.
The small pieces of bone were combusted to produce carbon dioxide which was then put through a mass spectrometer.