Infrared Spectroscopy Resources (FTIR)
Infrared Spectroscopy Resources: Infrared Spectroscopy (FTIR) is an analytical technique that relies on light in the infrared portion of the electromagnetic spectrum to characterize materials. FTIR is generally a qualitative tool that is particularly beneficial in identifying the presence of specific functional groups.
Cornerstone Analytical uses its internal procedure for FTIR analysis or can use nationally accepted methods such as USP <197> Spectrophotometric Identification Tests. Click here to view USP’s general chapter <197>.
FTIR preparation options available include ATR (Attenuated Total Reflectance) cell, KBr pellet and as a film between sodium chloride windows.
Analysis proceeds by scanning the sample over the infrared region, generally 4000 to 700 cm^-1. Once the spectrum has been obtained, the technician may review it for the presence and location of peaks. Absorbances in certain regions indicate the presence of particular functional groups.
Alternatively, the spectrum may be compared to a spectrum of a known compound. This is generally done by overlaying the spectrum onto a spectrum of a known or reference compound. This assists the technician in seeing the degree of similarity between the unknown sample and the standard. Either way, the spectrum is used to confirm the identity of the sample.
Cornerstone Analytical provides copies of the scans along with a copy of the laboratory report. A library match report is also included along with the scan.
Click the links below to view other resources on FTIR:
Contact us today to discuss our FTIR analysis service.