| Pyrolysis gas chromatrography-mass spectrometry, or PyGC/MS, is a sensitive technique used to compare complex compounds. This research evaluated PyGC/MS as a method for characterizing adhesives. It is a technique that has not commonly been used in forensic science to analyze various types and brands of adhesives. 48 brands were dried overnight before analysis. A minimum sample size of 100mug was placed in a quartz tube with both ends sealed with quartz wool. Samples were pyrolyzed to obtain pyrograms indicative of each sample's chemical components. Using the general patterns of the pyrograms the adhesives were compared and distinguished by brand and type. The adhesives were grouped into eight classes according to their general use. These eight classes of adhesives include: All-purpose glues, Contact Cement, Caulk, Fabric glues, Hot melt glue sticks, Super glues, Twist & Paste Glue Sticks, and Wood glues. |
