title: The analysis of clingfilms by infrared spectroscopy and thermal desorption capillary gas chromatography.
abstract: An automated thermal desorption gas chromatography technique has been adapted to analyse traces of volatile compounds in proprietary food-wrapping films. Fourteen brands of polyvinylchloride film, seven brands of polyethylene film and one polyvinylidene chloride film were discriminated. Prior infrared analysis was used to identify the polymer type. The chromatograms showed minor changes in volatiles along the length of a roll of film and major changes in films exposed to daylight or in contact with cannabis resin.
authors.affiliation: Metropolitan Police Forensic Science Laboratory, London, United Kingdom.
authors.forename: J
authors.initials: J
authors.lastname: Gilburt
authors.forename: J M
authors.initials: JM
authors.lastname: Ingram
authors.forename: M P
authors.initials: MP
authors.lastname: Scott
authors.forename: M
authors.initials: M
authors.lastname: Underhill
mesh_terms: D002849:Chromatography, Gas; D011095:Polyethylenes / Q000737:chemistry*; D011143:Polyvinyl Chloride / Q000031:analogs & derivatives* / Q000737:chemistry*; D015203:Reproducibility of Results; D013055:Spectrophotometry, Infrared
chemical_list: D011095:Polyethylenes; C029547:polyvinylidene chloride; D011143:Polyvinyl Chloride