Bernhard W R
Scientific Forensic Service, Zurich City Police, Switzerland.
J Forensic Sci. 2000 Nov;45(6):1312-5.
The collection and preservation of microtrace evidence with the aid of an adhesive tape is a method of choice in forensic science. This technique is rapid and easy and allows the concentration of microtraces on a carrier, which facilitates further investigations in the laboratory. Adhesive tapes are currently used to secure microtraces of fibers and glass, but hardly for traces of automotive paint and other lacquers for fear of interference with the analysis of binders. A collection of automotive paint consisting of original and repair lacquers collected by tape has been evaluated. After various times of storage within the tape, these samples were compared with untreated references by microscope FT-IR and microspectrophotometry (MSP). Another set of paints was collected in 1984, stored within the tape until 1995, and examined the same way. About 170 layers of lacquer with various types of binder were examined. With the exception of one clear lacquer no difference between treated samples and references was detected. This small difference observed could be correlated to the exposure to xylene (extractant) and was not caused by the storage within the adhesive tape.
借助胶带收集和保存微量物证是法医学中的一种首选方法。该技术快速简便，能使微量物证集中在载体上，便于在实验室进行进一步调查。目前胶带用于固定纤维和玻璃的微量物证，但由于担心干扰粘合剂分析，几乎不用于汽车漆和其他漆类的痕迹收集。对一组由胶带收集的包括原装漆和修补漆的汽车漆样本进行了评估。在胶带内储存不同时间后，通过显微镜傅里叶变换红外光谱仪（FT-IR）和显微分光光度法（MSP）将这些样本与未处理的对照样本进行比较。另一组漆样于1984年收集，在胶带内保存至1995年，并用同样方法进行检测。共检测了约170层含有各种类型粘合剂的漆。除一种清漆外，未检测到处理过的样本与对照样本之间存在差异。观察到的这一微小差异可能与二甲苯（萃取剂）的接触有关，而非胶带内的储存所致。
