Incoming goods inspection and quality control using Mid-IR spectroscopy are mainly performed using the so-called ATR (Attenuated Total Reflection) technique. It allows measuring IR spectra of almost all types of liquid, solid and paste-like samples within some seconds. For identity control the sample spectrum is compared against the spectrum of a reference substance.
To identify an unknown sample, e.g. in cases where the identity check failed or a contamination was detected, the measured spectrum is searched in a spectra library. The very compact ALPHA II FT-IR spectrometer with the Platinum diamond ATR module has proven to be very suitable for quality control applications. With its plug-and-play operation, ease of use and all preconditions for full validation it offers the capabilities you expect for routine analysis in the pharmaceutical environment.
The growing demand for portable Raman systems for material verification is constituted in the vast capabilities of this spectroscopic technique. High selective information content and no need of sample preparation combined with the capability to probe materials directly through transparent packaging material often make Raman spectroscopy as the method of choice.