BLEAY, S.M. ... (et al.), 2014. Non-invasive detection and chemical mapping of trace metal residues on the skin. RSC Advances, 4 (37), pp. 19525-19528.
Residual traces of the metals copper and lead on an individual's skin
may be elucidated by reaction of rubeanic acid with a gelatine lift
taken from the target area in question, yielding intensely coloured
reaction products. This non-invasive technique has been shown to
offer promise in chemically mapping the distribution of the minute
metal residues across an individual's hand deposited through touching
metal items, a technique with potential forensic significance.
This article was published in the journal RSC Advances and the definitive version is available from the Royal Society of Chemistry at: http://dx.doi.org/10.1039/c4ra02463j