The following table lists infrared spectroscopy absorptions by frequency regions.

The absorption bands in IR spectra have different intensity, that can usually be referred to as strong (s), medium (m), weak (w), broad and sharp. The intensity of a absorption band depends on the polarity of the bond, the bond with higher polarity will show more intense absorption band.

An infrared spectroscopy correlation table (or table of infrared absorption frequencies) is a list of absorption peaks and frequencies, typically reported in wavenumber, for common types of molecular bonds and functional groups. [1][2] In physical and analytical chemistry, infrared spectroscopy (IR spectroscopy) is a technique used to identify ...

This article will provide a table containing IR spectrum absorbtion frequency values and what they represent.

Detailed information about the infrared absorptions observed for various bonded atoms and groups is usually presented in tabular form. The following table provides a collection of such data for the most common functional groups.

IR bands can be classified as strong (s), medium (m), or weak (w), depending on their relative intensities in the infrared spectrum. A strong band covers most of the y-axis.

Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) is the measurement of the interaction of infrared radiation with matter by absorption, emission, or reflection. It is used to study and identify chemical substances or functional groups in solid, liquid, or gaseous forms.

The carbonyl stretching absorption is one of the strongest IR absorptions, and is very useful in structure determination as one can determine both the number of carbonyl groups (assuming …

近红外光是一种介于可见光 (VIS)和中红外光 (IR)之间的电磁波，美国材料检测协会 (ASTM)，将其定义为波长780～2526nm的光谱区。 利用 近红外光谱 的优点有：1.简单方便，有不同的测样器件可直接测定液体、固体、半固体和胶状体等样品，检测成本低。 2.分析速度快，一般样品可在1min内完成。 3.适用于近红外分析的光导纤维易得到，故易实现在线分析及监测，极适合于生产过程和恶劣环境下的样品分析。 4.不损伤样品可称为无损检测。 5.分辨率高可同时对样品多个 …

Infrared spectrometers, similar in principle to the UV-Visible spectrometer described elsewhere, permit chemists to obtain absorption spectra of compounds that are a unique reflection of their molecular structure. An example of such a spectrum is …