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首页> 美国卫生研究院文献>Forensic Sciences Research >Forensic examination of plastic drinking straws based on their physical characteristics and manufacturing marks
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Forensic examination of plastic drinking straws based on their physical characteristics and manufacturing marks

机译：根据塑料吸管的物理特性和制造标志进行法医检查

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摘要

This work highlights the evidential value of examining plastic drinking straws to establish linkages between multiple sources for forensic intelligence, investigative or prosecution purposes. Plastic drinking straws are commonly encountered in drug cases, either as inhalational paraphernalia or as packaging material. However, to the best of our knowledge, systematic studies on the evidential value of straws have not previously been carried out. In this study, over 80 packets of clear and colourless straws—most of which were visually similar—were purchased from various commercial outlets in Singapore. Some physical characteristics (viz., polarizing patterns, thickness, circumference and mass per unit length) and the manufacturing marks of these straws were examined to assess their potentials for discriminating straws from different packets. Comparison of polarizing patterns yielded a discrimination of approximately 69%, while thickness, circumference, and mass per unit length measurements resulted in lower discriminations. Comparison microscopy of manufacturing marks was found to be the most discriminating among all techniques employed herein, with a discrimination of about 95%, even among straws with similar polarizing patterns.
机译：这项工作强调了检查塑料吸管以建立多个来源之间的联系以进行法医情报，调查或起诉目的的证据价值。在吸毒的情况下，塑料吸管经常作为吸入用具或包装材料使用。然而，据我们所知，以前尚未对吸管的证据价值进行过系统的研究。在这项研究中，从新加坡的多家商业商店购买了80包以上清晰无色的吸管，其中大部分在视觉上都是相似的。检查了这些吸管的一些物理特性（即偏振图案，厚度，周长和单位长度质量）和制造标记，以评估其区分不同包装中的吸管的潜力。偏振图案的比较产生大约69％的辨别力，而厚度，周长和每单位长度质量的测量结果则辨别力较低。发现制造标记的比较显微镜在本文采用的所有技术中是最有区别的，即使在具有相似偏振图案的吸管中也有约95％的区别。

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