Get Adventurer Jon Osrs

INFORMATION OBTAINED FROM IR SPECTRA IR is most useful in providing information about the presence or absence of specific functional groups. IR can provide a molecular fingerprint that can be used when comparing samples. If two pure samples display the same IR spectrum it can be argued that they are the same compound.

Infrared Spectroscopy is the analysis of infrared light interacting with a molecule. This can be analyzed in three ways by measuring absorption, emission and reflection. The main use of this technique is in organic and inorganic chemistry. It is used by chemists to determine functional groups in molecules.

0:57 9:04 How to Read an Infrared Spectroscopy Graph - YouTube YouTube Start of suggested clip End of suggested clip So we can see that we've got various peaks on this diagram. And the question we're really looking atMoreSo we can see that we've got various peaks on this diagram. And the question we're really looking at is for example what is this one what is this one and also if you look in the fingerprint region.

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. A medium band falls to about half of the y-axis, and a weak band falls to about one third or less of the y-axis.

Infrared spectroscopy (IR) is used in the areas of determination of molecular structure, identification of chemical species, quantitative/qualitative determination of chemical species, and in a host of other applications. This technique is used in the investigation of matter in the solid, liquid, and gaseous states.

The presence of hydrogen bonding has two major influences on spectra. First, its presence causes a shift toward lower frequency of all functional groups that are involved in hydrogen bonding and second, the peaks are generally broadened.

In IR spectroscopy we measure where molecules absorb photons of IR radiation. The peaks represent areas of the spectrum where specific bond vibrations occur.

The peak positions in an infrared spectrum are used to distinguish different functional groups from each other. Different functional groups can have peaks at about the same position. For example, both O–H and N–H stretches have peaks around 3350 cm-1 (4).