Why customers use near infrared (NIR) spectroscopy?
The sensitivity and directivity of any spectroscopic measurements depends on band intensities. Short wavelengths, such as the visible region (400-800nm) are what spectroscopist call “3rd overtones”, which have considerable weaker band intensities (10x less) when compared to the 2nd overtone region (800-1100 nm). This is even further weeker(another 10X) compare to the 1st overtone region (1500-1800nm). Furthermore, overtones in the short wavelength region of 400-1100nm of various molecular stretches diminish the spectral finger prints effects, which render to no spectral discrimination making it harder to identify molecular information. Therefore, it is advantageous to use near infrared instead of using visible.
