Paint evidence can provide valuable associative information for crimes involving vehicular accidents and home invasions. The complex chemistry of paint is thoroughly interrogated with vibrational microspectroscopy, with results that are used for its classification and comparison. Traditional IR microscopy is frequently used to identify binders, some pigments and additives, but suffers from limited spatial resolution (less than 10 µm) and difficult sample preparation. On the other hand, Raman microspectroscopy affords the additional ability to identify colored pigments at high spatial resolution, thus providing complimentary information, but can often suffer from severe fluorescence interference, especially with coloured samples.
In this webinar, we will show how for the first time, submicron simultaneous Optical-Photothermal IR (O-PTIR) spectroscopy and Raman microscopy (IR+Raman) can be used to overcome many of these traditional limits and be used for non-contact, far-field submicron paint cross-sections to yield high quality spectra that are easily searchable and interpretable. Furthermore, we demonstrate how combining this analysis with simultaneous Raman, provides for a more thorough chemical characterisation of the paint cross-section, providing rich information on their organic and inorganic composition at high spatial resolution (less than 1 µm).
In conjunction with Dr Mustafa Kansiz, Director of Product Management at PSC we are proud to present this cutting edge webinar.
