Task: Text Categorization
Input (English): good solvents for this procedure include carbon disulfide and carbon tetrachloride, though both are highly toxic. For testing coatings and powders, this technique can be used with attenuated total reflectance. Liquids are placed between two salt plates as preparation for this technique, while solid compounds are ground in combination with (*) potassium bromide and pressed into a thin disc. This technique relies on stimulating the vibrational modes of molecules. The output from this technique is a plot of transmittance versus wavenumber in inverse centimeters and includes a "fingerprint" for each molecule. For 10 points, name this common lab technique for identifying functional groups in molecules using radiation wavelengths just longer than visible light.
Output (English): Science