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Updated: Mar 25, 2026

Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains
Published on: November 30, 2021
Technical note: Efficient removal of a PCR inhibitory agent (vivianite) found on excavated bones
Jitka Votrubova-Dubska1, Daniel Vanek2, Jaroslav Zikmund3
1Forensic DNA Service, Budinova 2, 180 81, Prague 8, Czech Republic.
Abstract:
During a rescue excavation in October 2011, archaeologists discovered a mass grave with 10 individuals. The skeletons should belong to victims of the battle of Reichenberg between the Austrian and Prussian armies on April 21, 1757. Several bones of the skeletons were covered with a blue colored encrustation. Initial DNA analysis failed due to strong inhibition. Chemical analysis of the bluish encrustation indicated the presence of the iron phosphate mineral vivianite (Fe3(PO4)2·(H2O)8). This technical note describes a novel procedure for the removal of this inhibitory substance.
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