FTIR as a Method for Qualitative Assessment of Solid Samples in Geochemical Research: A Review

Abstract

This study aims to collect information about soil investigation by FTIR. As we know, the FTIR technique is most often used in organic and bioorganic chemistry, while in geochemistry FTIR spectroscopy is not used very often. Therefore, there is a problem with the identification and interpretation of the IR spectra of minerals contained in sediments and soils. The reason for this is a deficiency of data about characteristic wavenumbers for minerals. Therefore, this study reviews and sums up, in one place, published articles that are connected to an investigation of minerals from 2002 to 2021 (based on the Scopus database). Additionally, the present review highlights various analytical techniques (ATR-FTIR, DRIFT, 2D-IR, and SR-FTIR) and discusses some of them for geochemical study. Additionally, the study describes helpful tools in the data pre-processing of IR spectra (normalization, baseline correction, and spectral derivatives).

Jute (Corchorus olitorius L.) Nanocrystalline Cellulose Inhibits Insect Virus via Gut Microbiota and Metabolism

“…The insoluble dietary cellulose was subsequently acquired after filtration (Figure B). Fourier transform infrared (FTIR) spectroscopy is a powerful tool used for the detection and characterization of various types of molecules, and the FTIR spectra of the jute cellulose is shown in Figure C. According to reported work, , the corresponding wavelengths and chemical groups were as follows: 3340 cm –1 and OH stretching of intramolecular hydrogen bonds for cellulose I, 2922 cm –1 and CH stretch, 1635 cm –1 and OH bend (caused by water adsorbed on the sample), 1410 cm –1 and CH 2 scissoring motion in cellulose, and 878 cm –1 and cellulosic-glycosidic bonds.…”

Soil type and integrated nitrogen nutrient-rice straw residue management techniques affect soil microbes, enzyme activities and yield of wheat crop

“…The FT-IR spectroscopy analysis predominantly provide information on the chemical functional groups representing different compounds/components of the soil sample. As the soil sample inherently contains the inorganic clay as the major component, the FTIR spectra from both the soil types exhibited clay lattice adsorbed inner hydroxyl functional groups (3712 to 3200 cm −1 ) [ 51 , 52 ]. The predominance for the less intensity of these peaks in both the soil samples represented the occurrence of quartz in sandy loam and kaolinite as the prominent clay component [ 53 , 54 ].…”

Construction of an OCP-ATR-FTIR Spectroscopy Device to In Situ Monitor the Interfacial Reaction of Contaminants: Competitive Adsorption of Cr(VI) and Oxalate on Hematite

“…The real-time information on the pollutant–mineral interfacial reaction can be collected with the in situ characterization technique. , For instance, attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy has been widely used to in situ monitor the change of infrared signals on a solid surface. − ,,− In our previous work, we successfully employed in situ ATR-FTIR measurement to check the facet-dependent Cr­(VI) adsorption configuration on hematite nanocrystals . Generally, the interfacial reactions between pollutants and soil minerals are often accompanied by electron transfer, which, in turn, affects the subsequent migration and transformation of pollutants. − If the signal of electron transfer could be collected simultaneously, then the interfacial processes would be clarified for a deep understanding of the related mechanisms.…”