FT-IR (Fourier Transform Infrared Spectroscopy) Analysis

FT-IR (Fourier Transform Infrared Spectroscopy) analysis is a technique widely used for the identification of chemical substances and the study of molecular structures. It is based on the specific absorption of infrared radiation by different chemical bonds and functional groups.

 

When molecules are irradiated with infrared radiation, they absorb radiation of specific wavelengths, leading to vibrations in the chemical bonds within the molecule. The wavelength of the absorbed radiation is related to the type and environment of the bonds within the molecule. The FT-IR spectrometer uses an interferometer to generate an interference pattern, which is then transformed into the spectrum we typically see using a Fourier transform.

 

Obtaining Spectra

The samples can be gases, liquids, or solids. Common methods for solid samples include mixing with an inorganic salt (such as KBr) and making a pellet, or using ATR (Attenuated Total Reflection) techniques.

 

Analyzing Spectra

The obtained FT-IR spectra display the relationship between wavenumber (usually in cm^-1) and absorption intensity. Each peak corresponds to the vibration of a specific chemical bond or functional group. By comparing with known data, the chemical bonds and functional groups in the sample can be identified.

 

Applications

1. Identification of Compounds

FT-IR can be used to identify unknown chemical substances by comparing with the spectra of known substances.

 

2. Study of Reactions

By measuring the FT-IR spectra before and after a reaction, changes in the chemical bonds and functional groups during the reaction can be understood.

 

3. Study of Material Properties

Such as polymers, natural products, and various materials.

 

4. Quality Control

In industrial production, FT-IR can be used to quickly check whether the chemical composition of the product meets the standard.

 

Service Advantages

1. Fast

Most FT-IR analyses only take a few minutes.

 

2. Non-Destructive

When using techniques such as ATR, the sample is usually not damaged.

 

3. Sensitivity and Resolution

FT-IR provides spectra with high sensitivity and high resolution.