Infrared refers to electromagnetic waves between the wavelength of visible light (0.78μm) and microwave (1000μm). Because molecules absorbs specific frequencies of infrared light, and transit to an excited state. Therefore, by reading the spectrum, we can realize the molecular structure. This is the basic principle of the infrared spectrometer.
Infrared spectrometer method, which is a kind of non-destructive analysis. The original structure of the sample won't be changed or damaged, after the measurement of IR spectrometer.
Both IR Spectrometer and Raman Spectrometer have their own advantage. They are used in the research of cell biology。For the application of Raman spectrometer, please refer to "How Raman Spectrometer Been Used On Biology Cell Research?".
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