Research Article
Purple Staining of Archaeological Human Bone: An Investigation of Probable Cause and Implications for Other Tissues and Artifacts
Table 3
Powder XRF results showing dominant elemental components. Bold is used to emphasize elements with a significant difference in average values between normal and purple colored specimens. There is no overlap of the 95% confidence intervals of the ppm value for any of the elements marked in bold. The null hypothesis that there is no difference in concentration of the respective elements in the normal and purple colored bone therefore does not hold at the 5% significance level (av: average of 3 readings; sd: standard deviation; all units: ppm).
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