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The % collagen yield test is performed on a small sub-sample of the submitted bone.

It is determined without the alkali pretreatment step since the alkali reduces the collagen content significantly while removing contamination and gives false % collagen yield results.

– Fees are inclusive of d13C measurements, d15N measurements (except cremated bones), quality assurance reports, calendar calibration when applicable, and 24/7 web access to past results and pending analyses.

Additional fee is charged for collagen or bone carbonate extraction.

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