Abstract:
Both solution and solid state Nuclear Magnetic Resonance
(NMR) spectroscopic techniques have been used 10 determine
differences in commercially available condoms. Whilst solid
state NMRis useful for determining the polymer backbone. it is not
useful for forensic analysis due to the commonality of the latex condom.
However solution NMR spectra obtained following a simple
extraction procedure using hexane. provides a fingerprint of the additives
in the lubricants. Following the development of a flow chart.
basing decisions on the presence of particular peaks present in the
solution spectra, 33 of 38 condoms could be individualized. Samples
were also analyzed after having the lubricant manually removed
and soaking the condom in water for 3 to 24 h. These experiments
were performed to simulate a case of the sample having been
used and disposed of by flushing down the toilet. as may be experienced
in a case of a sexual assault. The results indicated that the
only significant water soluble component was polyethylene glycol.
The overall results suggest that the method developed may be a
quick and useful technique in characterizing condoms. The information
obtained can be used 10 provide associative evidence between
suspect and crime. and so be useful in sexual assault cases.
