This study deals with the phenomenon of graves without any bone material combined with an application test of a portable X-Ray fluorescence detector (pXRF) instrument on simulated burial soils to see if we could get any closer understanding of this phenomenon. To test the instruments applicability on these types of conditions, an experiment was conducted with three different soil types. These were placed in separated, specifically pre prepared plastic tubes in groups of three per soil type and then prepared with circa 9 grams of cremated animal bones that was grinded down to a powder. The tubes were then subjected to eater flow equivalent to circa 50 years of rainfall. The tubes were thereafter disassembled and soil samples where gathered and analyzed with a pXRF. The results showed little movement of the bone powder and clear spikes of Ca and P could be seen at the place of disposal of the bone powder and some spreading sideways and down in the tube. The study also search for Mg as an indicator for bone material alongside Ca and P but no clear results could be reached due to excessive variation.   The method of using pXRF in the search for bone material in soils has, as seen in the results of this study, great potential even though more research is needed to reach a better understanding of the methods limitations.