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Forensic examiners must work with several instruments to find distingtive features which enable them to compare known materials with sample data. The time to perform these tasks are typically a critical issue.

The Single Particle Explorer metal.ID + raman.ID combines in one instrument: optical, vibrational and elemental spectroscopy. Delivering information on particles color, size, shape, numbers, chemical structure and elemental composition. Imaging led spectroscopy allowing extremely fast and efficient analysis of trace evidence. Resulting in fully automated reporting of GSR , soil samples or any other trace evidence samples.
The speed and flexibility of the SPE units also ensure smooth operation; with fast and reliable results in the forensic sciences.



Sample Preparation


Sample Preparation Typically particles are impacted on a surface from an airstream, glued to a tape, or filtered from a liquid. For filtration you can use any standard filter such as cellulose nitrate 25 mm or 47 mm filter patches and a similar type of membranes. On those membranes the SPE easily counts and identifies inorganic particles with metal.ID > 2 µm . Identification of organic particles such as fibres with raman.ID is limited to particles larger than > 25 µm in each dimension. They effectively shield the Raman laser focus from the filter material. To identify particles as small as 5 µm with imaging led Raman spectroscopy we suggest the use of the dedicated gold coated filtr.AID membranes. Adhesive tapes that are typically used in forensic investigations can also be mounted directly in the instrument.

 


Particle Identification


SPE-f raman.ID +metal.ID enables you to determine chemical elements as well as chemical structure information using Raman Spectroscopy for particles at a rate of thousands per hour. For the first time two orthogonal spectroscopy technologies can identify unknown particle material. Thanks to the intuitive software control, you will be able to obtain statistically relevant information after a short introductory training period. Simply insert the sample, select the relevant particle size and shape, then allow the system to identify the exact chemical composition and elemental distribution.