Research and quality control laboratories benefit from NIRS alike. While researchers can accelerate their experimentation, QC departments benefit from the ability to analyze hundreds of samples per day – both saving substantial amounts of time and money.
NIR spectroscopy is a fast non-destructive analytical method. Almost any kind of sample can be scanned within seconds with minimal or even no preparation at all. NIRS can verify the identity of a sample and quantify multiple chemical and physical properties simultaneously.
BUCHI’s FT technology combines accuracy and robustness. Fourier Transform spectrometers grant high wavenumber accuracy and best signal to noise ratio. Polarization interferometers are insensitive to mechanical disturbances and hence ideal for rough environments.
The heart of the interferometer consists of two bi-refringing crystal wedges. By moving one wedge, a part of the light undergoes a phase shift. This phase shift alters the polarization of the entire beam. After passing a polarization filter the interferogram is detected. All wavelengths are measured simultaneously.
For modern instruments 8 cm-1 resolution is optimal for NIR measurement. As NIR spectral bands are relatively broad, higher resolutions do not improve the performance of NIR application. On the contrary, higher resolution spectra have a poorer signal-to-noise ratio within a given measurement time.
Yes, in a regulatory environment all evaluations performed using an NIR spectrometer must be signed by an operator; the necessary operating procedures must be approved according to the ‘four-eye’ principle. Electronic signatures must thus be implemented so that this signing-off procedure can be performed in the application. The BUCHI Software is designed to be compliant to the current guidelines such as: US FDA CFR21 Part 11 or Eudralex Volume 4 Part 11.
