What is Diffuse Reflectance Spectroscopy?
Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) involves numerous light-sample interactions. Spectra may exhibit features associated with the transmission and/or reflection (external and/or internal) of infrared radiation. This technique is most often employed in the analysis of powders and rough surfaces. Prior to analysis it is recommended that samples be ground to a particle size of between 2 to 5 microns to reduce the amount of specularly reflected light. Additionally, samples which are highly absorbing or possess a high refractive index are diluted with a diffusely scattering matrix, e.g. KBr. This tool is useful for analyzing intractable solids by scratching the sample surface with an abrasive paper and then measuring the spectra of the particles adhering to the paper. This technique is available using the IFS 66/S spectrometer Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) is a technique that collects and analyzes scattered IR energy. I
