Raman scattering is a spectroscopic technique that is complementary to infrared absorption spectroscopy. Raman offers several advantages over mid-IR and near-IR spectroscopy, including:
Little or no sample preparation is required
Water is a weak scatterer - no special accessories are needed for measuring aqueous solutions
Water and CO2 vapors are very weak scatterers - purging is unnecessary
Inexpensive glass sample holders are ideal in most cases
Fiber optics (up to 100's of meters in length) can be used for remote analyses
Since fundamental modes are measured, Raman bands can be easily related to chemical structure
Raman spectra are "cleaner" than mid-IR spectra - Raman bands are narrower, and overtone and combination bands are generally weak
The standard spectral range reaches well below 400 cm-1, making the technique ideal for both organic and inorganic species
Raman spectroscopy can be used to measure bands of symmetric linkages which are weak in an infrared spectrum (e.g. -S-S-, -C-S-, -C=C-)
Raman scattering is a spectroscopic technique that is complementary to infrared absorption spectroscopy. Raman offers several advantages over mid-IR and near-IR spectroscopy, including:Little or no sample preparation is requiredWater is a weak scatterer - no special accessories are needed for measuring aqueous solutionsWater and CO2 vapors are very weak scatterers - purging is unnecessaryInexpensive glass sample holders are ideal in most casesFiber optics (up to 100's of meters in length) can be used for remote analysesSince fundamental modes are measured, Raman bands can be easily related to chemical structureRaman spectra are "cleaner" than mid-IR spectra - Raman bands are narrower, and overtone and combination bands are generally weakThe standard spectral range reaches well below 400 cm-1, making the technique ideal for both organic and inorganic speciesRaman spectroscopy can be used to measure bands of symmetric linkages which are weak in an infrared spectrum (e.g. -S-S-, -C-S-, -C=C-)
การแปล กรุณารอสักครู่..
