Hashimoto Takashi, Howitt David G, Land Donald P, Tulleners Frederic A, Springer Faye A, Wang Shunlin
Forensic Science Laboratory of Hyogo Prefecture Police HQ, 5-4-1 Shimoyamate-dori Kobe, Hyogo Pref., Japan.
J Forensic Sci. 2007 Sep;52(5):1082-8. doi: 10.1111/j.1556-4029.2007.00514.x. Epub 2007 Jul 21.
The discrimination of noncolored transparent polyethylene bags was studied by several nondestructive and semidestructive analytical methods. X-ray diffraction, infrared spectroscopy, and optical microscopy (differential interference contrast microscopy and phase contrast microscopy) were applied to polyethylene films. X-ray diffraction was used to distinguish variations in the crystalline phase, infrared spectroscopy was used to distinguish variations in the molecular components, and optical microscopy was used to distinguish the different surface morphologies. The results show that X-ray diffraction classifies the crystalline phase of the film depending on whether it is made from low-density polyethylene, linear low-density polyethylene, or high-density polyethylene; that infrared spectroscopy is useful to distinguish the molecular components and it is the most discriminating technique; and that optical microscopy discriminate films easily by their morphological differences.
采用多种无损和半无损分析方法对无色透明聚乙烯袋进行了鉴别研究。将X射线衍射、红外光谱和光学显微镜（微分干涉对比显微镜和相差显微镜）应用于聚乙烯薄膜。X射线衍射用于区分结晶相的变化，红外光谱用于区分分子成分的变化，光学显微镜用于区分不同的表面形态。结果表明，X射线衍射根据薄膜是由低密度聚乙烯、线性低密度聚乙烯还是高密度聚乙烯制成来对其结晶相进行分类；红外光谱有助于区分分子成分，是最具鉴别力的技术；光学显微镜可通过薄膜的形态差异轻松鉴别薄膜。
