Schwarz Lothar, Hermanowski Mona-Lena
Kriminaltechnischen Institut des Bundeskriminalamtes Wiesbaden.
Arch Kriminol. 2008 Jul-Aug;222(1-2):14-22.
With a simple experimental set-up, common packaging materials were tested for their ninhydrin permeability. The packaging material was loaded with a ninhydrin treated paper on the inside and covered with an amino acid treated paper on the outside. If ninhydrin penetrates through the packaging film, "Ruhemann's purple" will form on the amino acid treated paper. In all, 28 packaging materials were tested over a period of 24 weeks. It turned out that all the films made of polyethylene (PE) showed ninhydrin permeability. With one exception, this permeability occurred after three days already. All packages made of other film material were not permeable to ninhydrin.
通过一个简单的实验装置，对常见包装材料进行茚三酮渗透性测试。包装材料内部放置一张经茚三酮处理的纸，外部覆盖一张经氨基酸处理的纸。如果茚三酮穿透包装膜，在经氨基酸处理的纸上会形成“鲁赫曼紫”。总共在24周的时间内测试了28种包装材料。结果表明，所有由聚乙烯（PE）制成的薄膜都显示出茚三酮渗透性。除一个例外，这种渗透性在三天后就已出现。所有由其他薄膜材料制成的包装对茚三酮都不具有渗透性。
