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Technical note: Temperature estimation accuracy based on colourimetry of embalmed human and fresh non-human burned
Tristan Krap1,2,3, Afke Leenstra4, Roelof-Jan Oostra5
1Faculty of Law and Criminology, Maastricht University, Minderbroedersweg 4-6, Maastricht, 6211 LK, The Netherlands. t.krap@maastrichtuniversity.nl.
Abstract:
Estimation of the exposure temperature of skeletal remains can be done by means of colourimetry and a previously published decision model for the colourimetric data, resulting in clusters that represent a range of exposure temperature. The method was based on thermally altered freshly burned human skeletal remains. However, in practice the origin or pre-burning condition of (possibly fragmentary) burned remains can be unknown. Further, in order to use the colourimetric analysis, and accompanying decision model, it is important to have a reference or test set. Fresh human material is not available for this purpose in all countries. Hence, the classification accuracy of the decision model was tested for, in some countries more readily available substitutes for fresh bone; embalmed human bone and non-human bone. The model yielded high accuracies for these sample materials, making it possible to create a reference or test set from fresh non-human and embalmed human bone as substitute for human, and also to use the decision model for these deviating samples in practice.
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