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Fourier Transform Infrared Spectroscopy, or FTIR, is a technique used to measure the properties of a sample’s vibrational modes. The FTIR instrument detects the changes in the properties of the sample, and the results can be used to analyze the sample in the laboratory and in applications, such as materials characterization, industrial process control, biomedical research, drug development and environmental monitoring. In this article we will discuss the application fields for FTIR and its working principle.

Application Fields

FTIR spectroscopy can be used in a variety of fields. In the food industry, FTIR is used to analyze the fat content of animal and vegetable products, the nutritional value of food and to identify additives and contaminants. In the medical field, FTIR is used to analyze lipid levels, to measure metabolic markers, to detect genetic mutations, and to aid in the diagnosis and treatment of diseases. Industrial applications include process control, contamination testing, and determining the properties of materials. FTIR is also used in pharmaceutical research to analyze drug compositions, which helps to identify counterfeit drugs. Additionally, FTIR is used in the forensic field for the identification of explosive residues.

Working Principle

FTIR works by measuring vibrational modes of a sample. Every material has a unique vibrational frequency that changes depending on the molecular composition of the sample. These vibrational modes can be observed by shining a beam of infrared light through a sample and measuring the intensity of the different reflections. This information is collected and an FTIR spectrum is created, which is a graph with a series of peaks indicating the various vibrational modes present in the sample. By analyzing these peaks, the molecular composition and structural information of a sample can be obtained.

FTIR is an excellent technique for materials characterizing, process controlling and environmental monitoring. It provides rapid analysis of a wide range of materials, and the results are often more accurate than manual measurements. The technique is also user friendly, and can be used in a variety of laboratory settings. FTIR is also non-destructive, so samples can be measured multiple times without causing damage to the sample.

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