1 For severe stains, add 1-2 cups vinegar to the wash cycle as well. 2  To remove a rust stain from your cotton work clothes, moisten the spot with some full-strength vinegar and then rub in a bit of salt. 3  If itâs warm outdoors, let it dry in the sunlight (otherwise a sunny window will do), then toss it in the wash.
absorption spectrum - the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths. spectrum - an ordered array of the components of an emission or wave.
Infrared (IR) absorption spectroscopy is the measurement of the wavelength and intensity of the absorption of mid-infrared light by a sample.Mid-infrared light (2.5 - 50 Âµm, 4000 - 200 cm-1) is energetic enough to excite molecular vibrations to higher energy levels.R spectroscopy is used to confirm the identify of a particular compound and as a tool to help determine the structure of a newly synthesized molecule (with NMR spectroscopy and mass spectrometry). Mechanism of IR absorption. dipole moment operator: Âµ = Âµo + (r-re)(dÂµ/dr) + ... higher terms.