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The % collagen yield value should not be used as a unique identifier of bone collagen quality because it can be very misleading.The C: N, %C and %N results are much better indicators of good collagen.

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The bone sample is first tested for friability (“softness”).

Very soft bone material is an indication of the potential absence of the collagen fraction (basal bone protein acting as a “reinforcing agent” within the crystalline apatite structure).

The d13C and d15N ratios are measured using an isotope ratio mass spectrometer (IRMS).

We may not be able to provide d15N measurements for charred or heated bones depending on the sample quality. Beta Analytic also provides %C, %N, C: N and % collagen yield at no additional cost for non-cremated bones submitted for AMS dating.

If your samples are already powderized, please contact us for discussion.