Analytical Chemistry Research

Investigation of Inks Using Thin Layer Chromatography in Combination with Raman Spectroscopy

Analysis of inks and pigments of fraudulent art work and inks found on notes in crime scenes is critical in forensic investigations.  One of the most traditional techniques used for determining the individual ink components is Thin Layer Chromatography (TLC). In this project, the TLC technique will be combined with Raman Spectroscopy to determine the signature of the individual components of different inks directly onto the TLC plates. This will be also compared to the FTIR signature of each component and will allow us to categorize different inks according to their specific manufacturer.

Investigation of Tapes and Adhesives Using Raman Spectroscopy

Raman Spectroscopy can be used as an alternative technique for forensic determination of material characteristics. The unique “fingerprint” spectra can be used to differentiate materials from each other. Duct tape and electrical tape are the two most commonly found tapes during crime scene investigations. It is important to be able to recognize the different characteristics of these tapes depending on the manufacturer. In this project, an investigation of different duct and electrical tapes as well as their adhesives will be performed using Raman and FTIR Spectroscopies.  Microscopy will also be used to determine the different weaving patterns of the different duct tapes.