Chromatographic fingerprinting – a tool for classification and for predicting the degradation state of degradable polyethylene

A quantitative differentiation method for plastic bags by infrared spectroscopy, thickness measurement and differential scanning calorimetry for tracing the source of illegal drugs

“…A second hypothesis was that group 3 bags were mixed with a pro-oxidant such as a metal salt (i.e. Fe(II)-stearate) that may catalyze thermal and photo-oxidation in degradable PE [14]. This would explain the presence of the peak at 1740 cm À1 , due to partial oxidation of the film.…”

“…A number of methods have been proposed for the analysis of plastic packaging films, among which UV-vis [2] and infrared (IR) spectroscopy [2], differential scanning calorimetry (DSC) [5], pyrolysis-gas chromatography [13], gas chromatographymass spectrometry [14] and elemental analysis [15,16], but their effectiveness in discriminating specimens of the same polymer basis (i.e. mass produced articles) has rarely been accounted for.…”

Statistical Classification of Cigarettes Using High Pressure Liquid Chromatograms of Cigarette Filter Tar as Fingerprint

“…Recently, several articles are reported on the chromatographic fingerprints [12][13][14][15][16][17][18][19][20][21][22]Li et al 12 for instance, claimed that the binary chromatographic fingerprints, namely HPLC/DAD (diode array detector) fingerprint and GC/MS fingerprint are suitable for quality control of the total alkaloids. The chromatographic fingerprint was used by Burman and Albertsson 13 as a tool for the classification and for predicting the degradation state of degradable polyethylene. The classification and the prediction models were obtained by multivariate analysis.…”

A quantitative differentiation method for plastic bags by wide angle X-ray diffraction for tracing the source of illegal drugs

“…Although a number of techniques and methods have been proposed for the analysis of these items [2,5,6,[8][9][10][11], X-ray diffraction has not, to the knowledge of the authors, been considered in forensic applications.…”