Introduction to the Raman Instrument
The CASPiE Raman instrument is not a standalone instrument but rather an accessory attachment on a Fourier Transform Infrared Spectrometer (FTIR). Only the FT-Raman accessory has an autosampler and can be run remotely. The Raman autosampler holds 16 sample tubes in a circular wheel. The wheel turns to move a selected sample tube into the path of the Raman laser. The tubes are special 3-in NMR tubes which can accommodate both liquid and solid samples. An infrared laser strikes the sample in the autosampler wheel stimulating the Raman signal. The Raman scatter is directed to an interferometer inside the FTIR which encodes all of the signal frequencies into an interferogram. The light is then passed to the detector which records the encoded signal. The interferogram is decoded by a computer using a mathematical function called a Fourier Transform which gives the frequency spectrum of the Raman signal. The Raman frequency spectrum contains information about the functional groups present in the sample.

Preparation of Solid Samples for Raman Analysis >>>
Introduction to the CASPiE Raman Instrument (Movie File) >>>
How to the Run Raman Instrument (PDF Document) >>>
Raman Data Processing (PDF Documentation) >>>