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A quantitative differentiation method for plastic bags by wide angle X-ray diffraction for tracing the source of illegal drugs 总被引:1,自引:0,他引:1
Thirty-three shopping bags, commonly encountered in the packaging of drug doses, were characterized by wide angle X-ray diffraction (WAXD). Using this single technique, without sample preparation, nearly all the considered samples could be differentiated, achieving a discriminating power of 0.992. The rather large degree of variability existing in grocery bags, even though they are mass produced, was shown, confirming that these items can be useful in tracing the source of illicit drug doses. 相似文献
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The use of three analytical techniques for forensic investigation of synthetic polymers is described. These techniques are: pyrolysis infrared spectrometry (PyIR), pyrolysis gas chromatography (PyGC) and energy dispersive X-ray micro probe analysis (EPMA). Whereas the first two methods have been described previously, the microanalytical procedure is new. It may be used in combination with one of the other two techniques for the discrimination between polymer samples. 相似文献
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J.M. Challinor 《Forensic science international》1983,21(3):269-285
A simple system of pyrolysis capillary gas chromatography has been used to improve discrimination and long-term reproducibility in the analysis of polymers particularly alkyd based paints typically encountered in forensic casework. This involved the coupling of a Pye Curie-point pyrolyser to the inlet port of a capillary gas chromatograph operated in the splitless mode. Examples of pyrograms demonstrating improved differentiation of alkyd paints, and also examples of other architectural and automotive paints, automobile rubbers, adhesives, polyurethane foams and fibres are shown. 相似文献
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