Micro-Fourier Transform Infrared Spectroscopy (Micro-FTIR) is an analytical technique that studies the structure and composition of molecules and quantifies chemical components in a sample. Micro-FTIR is based on the principle that molecules absorb infrared radiation at specific frequencies, which can be used to identify them. This technique is an essential tool for researchers in many industries, including pharmaceuticals, food science, biochemistry, environmental sciences, and materials science. This technique can provide crucial information on the molecular structure of organic and inorganic components and is used extensively for the chemical characterization of geological samples. Micro-FTIR is suitable for in situ, non-destructive characterization of microfossils, small fluid, and melt inclusions within crystalline samples, and volatiles in glasses and minerals. FTIR is a useful investigative analytical technique that is frequently used on unknown samples or to detect trace contamination or changes in sample composition.
Principle and Methodology of Micro-Fourier Transform Infrared Spectroscopy (Micro-FTIR)
When infrared radiation interacts with molecules in a sample, it causes them to vibrate at certain frequencies. These vibrations cause the molecules to absorb specific frequencies of light, which can be measured and used to identify the chemical composition of the sample.
The sample preparation involves grinding or crushing the sample into a fine powder and dispersing it in a solvent. The sample is then placed on an infrared plate and exposed to infrared radiation from an FTIR spectrometer. The spectrometer measures how much light is absorbed by each molecule in the sample at different frequencies. This data can then be used to identify the chemical composition of the sample.
Uses of Micro-Fourier Transform Infrared Spectroscopy (Micro-FTIR)
The micro-FTIR technique identifies the degradation phases and establishes the structural relationship between them and the substratum. MIcro-FTIR has high analytical sensitivity and high spatial resolution. The reliability of the measurements, even with an extremely small amount of sampled material, is very high when using the Micro-FTIR technique.
Advantages of Micro-Fourier Transform Infrared Spectroscopy (Micro-FTIR)
Micro-FTIR has several advantages over other spectroscopic techniques, such as UV/Vis and NMR spectroscopy. Firstly, it is a non-destructive technique and requires minimal preparation of samples, making it faster and easier than other techniques. Secondly, it provides detailed information about molecular structures that can be used for identification. Finally, it can detect very small concentrations of molecules, which are not detectable by other methods.
Disadvantages of Micro-Fourier Transform Infrared Spectroscopy (Micro-FTIR)
Some disadvantages associated with this technique include its high cost due to the sophisticated instrumentation required for analysis, its limited resolution compared with other techniques, and its susceptibility to interference from water vapor or dust particles present during analysis. Only a few inorganic substances have an FTIR spectrum, and FTIR cannot examine metals that reflect light.
