FT-IR spectrometer

What is the FTIR spectrometer?

The FT-IR spectrometer is an advanced device used to identify and analyse chemicals by absorption of infrared radiation. It is noted for its ability to provide rapid and accurate analysis of a wide range of materials. Its operation is based on the Fourier transform, which allows converting data in the time domain to the frequency domain, thus facilitating the identification of the different molecular vibrations present in a sample.

How does FT-IR work?

Interpreting the results of an FTIR spectrum involves analysing the absorption peaks that appear in the spectrum. These peaks correspond to different molecular vibrations, each characteristic of specific bonds in the molecule.

Peak identification: Each molecule has a unique pattern of infrared absorptions, known as a ‘fingerprint’. By comparing the spectrum obtained with databases of known spectra, the molecular composition of the sample can be identified.
Peak intensity: The height or intensity of the peaks is related to the amount of the absorbing substance present. A higher peak indicates a higher concentration of that type of bond or functional group in the sample.
Functional Group Analysis: Different regions of the infrared spectrum correspond to different types of vibrations (stretching, bending, etc.) and types of bonds (C-H, O-H, N-H, C=O, etc.). For example, stretching vibrations of OH groups are generally observed around 3200-3600 cm-¹.
Comparison with Reference Spectra: By comparing the sample spectrum with reference spectra, specific compounds can be identified and the purity of the sample can be assessed.

Benefits of infrared spectrometry

One of the key benefits of the FT-IR spectrometer is its high measurement accuracy and speed of results. This makes it an indispensable tool in research laboratories, quality control, and forensic engineering cases, as it allows detailed analysis to be carried out in a matter of minutes, significantly reducing the time needed to make decisions based on the data obtained.

FT-IR equipment

At INFINITIA we have the Alpha FT-IR Spectrometer, known for its compact design and ease of use. This particular model is designed to be accessible to both experienced users and those new to infrared spectroscopy, offering an intuitive interface and efficient operation.

Applications of FT-IR Spectroscopy

The FT-IR spectrometer has diverse applications in many research fields and industrial sectors. The following are some of the most relevant applications.

Identification of organic substances and polymers:

It allows the chemical composition of organic and polymer samples to be determined, facilitating product development and control in the chemical industry.

Polymer degradation:

Helps to study the degradation processes of polymers, which is crucial to understand their durability and improve their performance in various applications.

Blend identification:

It is able to analyse complex mixtures, identifying each of the components present, which is essential in the pharmaceutical and food industry.

Surface activation assessment:

Used to measure the effectiveness of surface treatments, ensuring that activation processes are carried out correctly.

Real-time monitoring of curing and other chemical reactions:

Allows real-time monitoring of chemical reactions, ensuring that curing processes and other reactions are carried out optimally.

These applications demonstrate the versatility and importance of the FT-IR spectrometer in scientific research and industrial development, offering accurate and efficient solutions to a variety of analytical challenges.

Here are some examples of the use of FT-IR at INFINITIA:

Identification of unknown contaminants during the manufacturing process