Why is ATR used in FTIR spectroscopy?

Why Is ATR Used In FTIR Spectroscopy?

Tamilnadu Test House Pvt Ltd offers ATR-FTIR services for identifying chemical compounds, studying molecular structures, examining surface properties, analyzing polymers, investigating biomolecules, monitoring chemical reactions, and assessing the composition of materials in industries such as pharmaceuticals, materials science, forensics, and environmental analysis.

Because ATR-FTIR can measure spectra without needing any sample preparations or dilution, so ATR spectroscopy has found applicability in analysing solid and liquid materials. One of the earliest uses of ATR was to obtain the infrared spectra of polymer samples and films.

What Types Of Samples Can You Analyse With ATR?

ATR is ideal for strongly absorbing or thick samples which often produce intense peaks when measured by transmission. ATR works well for these samples because the intensity of the evanescent waves decays exponentially with distance from the surface of the ATR crystal, making the technique generally insensitive to sample thickness. Other solids that are a good fit for ATR include homogeneous solid samples, the surface layer of a multi-layered solid, or the coating on a solid.

Even irregular-shaped, hard solids can be analyzed using a hard ATR crystal material such as diamond. Ideal solids include Laminates, Paints, Plastics, Rubbers, Coatings, Natural powders, and Solids that can be ground into powder. In addition, ATR is often the preferred method for liquid analysis because it simply requires a drop of liquid to be placed on the crystal. ATR can be used to analyze: Free-flowing aqueous solutions, Viscous liquids, Coatings, and Biological materials

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