Causin Valerio, Marega Carla, Marigo Antonio, Carresi Pietro, Della Guardia Vittorio, Schiavone Sergio
Dipartimento di Scienze Chimiche dell'Università, via Marzolo 1, 35131 Padova, Italy.
Forensic Sci Int. 2009 Jul 1;188(1-3):57-63. doi: 10.1016/j.forsciint.2009.03.014. Epub 2009 Apr 14.
Latex gloves are quite frequently employed by felons, when committing crimes, if they want to avoid shedding fingerprints or biological traces. Less forensic aware crime committers, though, may discard the gloves at the crime scene or nearby. If found and properly analyzed, these items may therefore provide useful information to investigators. An analytical procedure of such items is proposed, using thermogravimetry and differential scanning calorimetry. By these very straightforward and inexpensive techniques, without sample preparation, nearly all the considered samples could be discriminated. 99.5% of the possible pairs of latex gloves, indistinguishable by visual examination, were differentiated. The rather large degree of variability existing in latex gloves, even though they are mass produced, was shown, confirming that these items can be useful in comparisons between items related to the crime scene and those seized in the suspect's premises.
乳胶手套经常被重罪犯在犯罪时使用，若他们想避免留下指纹或生物痕迹。不过，缺乏法医意识的犯罪者可能会在犯罪现场或附近丢弃手套。因此，如果这些物品被找到并得到妥善分析，可能会为调查人员提供有用信息。本文提出了一种对此类物品的分析程序，采用热重分析法和差示扫描量热法。通过这些非常简单且廉价的技术，无需样品制备，几乎所有考虑的样品都能被区分。99.5%在目视检查中无法区分的乳胶手套对被鉴别出来。结果表明，即使乳胶手套是大规模生产的，其仍存在相当大的变异性，这证实了这些物品在将与犯罪现场相关的物品与在嫌疑人住所查获的物品进行比对时可能会很有用。
