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Fourier transform infrared spectroscopy (FTIR) is an optical analytical method used to detect the presence of organic and polymeric substances in solid, liquid, and gaseous samples. By creating an infrared absorption spectrum, it can recognise the chemical connections within a molecule. High-resolution spectral data are concurrently collected over a broad spectral range by an FTIR spectrometer.
Fourier transform infrared spectroscopy (FTIR) is an optical analytical technique frequently used to identify organic and polymeric compounds in solid, liquid and gaseous samples. It is widely used for gaining structural information of unknown compounds in samples, residue and contaminants analysis, product development, failure analysis, investigative studies, etc.
FTIR uses infrared light to irradiate a sample and polymeric and organic compounds, present in the sample, produce their distinctive fingerprint in the form of an infrared absorption spectrum (interferograms). The FTIR software applies fourier transformations to convert this interferogram to IR spectra that are unique to the various functional groups and chemical bonds present in the sample. Comparing these spectrographs against available databases can give quantitative analysis of the compounds present in the materials.
There are different sampling techniques such as transmission, specular reflectance, diffuse reflectance, and Attenuated Total Reflection (ATR). Specular reflectance is used for both organic and inorganic samples having large, flat, and reflective surfaces. In diffuse reflectance, powder samples are examined in the form of a KBr pellet. In ATR, insoluble, multi-layer, or solid samples are analyzed using hard crystal material.
In order to get over the restrictions imposed by dispersive devices, Fourier Transform Infrared (FT-IR) spectroscopy was created. The lengthy scanning procedure was the biggest challenge. It was necessary to develop a technique for sensing all infrared wavelengths simultaneously as opposed to separately. An interferometer, a very basic optical tool, was used to create a solution.
All of the infrared frequencies are “encoded” into a special kind of signal that the interferometer generates. The measurement time for the signal is typically on the order of one second or less. As a result, the time element per sample is decreased from several minutes to a few seconds.
Infrared spectroscopy now provides a number of important practical benefits thanks to the Fourier Transform Infrared (FT-IR) technology. It has enabled the creation of numerous new sampling approaches that have been intended to solve difficult situations that were insurmountable with earlier technologies. It has almost unlimited the application of infrared analysis.
Video 01: Introduction to Infrared Spectroscopy (IR)
Fourier Transform Infrared Spectroscopy (FTIR) Common Uses
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Our network of material testing labs regularly provides fourier transform infrared spectroscopy (FTIR) testing services to identify and characterize materials.
ATR-FTIR analysis of materials starts at $175/sample
Fourier transform infrared spectroscopy (FTIR) provides chemical composition and physical state information of films, solids, powders, or liquids. It is used to identify and characterize unknown materials, Identify contamination, Identify additives in polymers, etc.
Typical fourier transform infrared spectroscopy (FTIR) analysis includes quantitative analysis of organic and inorganic samples. Reference libraries are available with 1000’s standards that are used to identify materials and for quantitative analysis. Gaseous phase analysis is available where FTIR can be coupled with thermal analysis, chromatography, and rheometry.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 test is a standard test method for the analysis of sulfochromate etch solutions used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
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