Reflectance IR Spectroscopy

Khoshhesab, Zahra Monsef

doi:10.5772/37180

Cited by 33 publications

(34 citation statements)

References 4 publications

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“…The wood powder contacted the ATR crystal, and the evanescent wave could be absorbed by the powder. The resultant attenuated radiation produced an ATR spectrum, which is similar to a conventional absorption spectrum [21].…”

Section: Ft-ir and Ft-raman Spectroscopymentioning

confidence: 99%

Examination of the chemical changes in spruce wood degraded by brown-rot fungi using FT-IR and FT-Raman spectroscopy

Durmaz

Özgenç

Boyaci

et al. 2016

Vibrational Spectroscopy

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Section: Ft-ir and Ft-raman Spectroscopymentioning

confidence: 99%

Examination of the chemical changes in spruce wood degraded by brown-rot fungi using FT-IR and FT-Raman spectroscopy

Durmaz

Özgenç

Boyaci

et al. 2016

Vibrational Spectroscopy

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“…Alternatively, diffuse reflectance occurs when the laser penetrates the sample and the incident ray is reflected at many different angles, moving through the matrix before reaching the detector. DRIFTS has proven useful when analyzing samples with a rough surface, such as soil, since it accounts for diffuse scattering between particles (Khoshhesab 2012 For this study, dry mineral soils were sieved using a 250 µm sieve and stored in a desiccator until time of analysis. Peat samples required a ERDC TR-17-9 7 slightly different preparation protocol.…”

Section: Experimental Methodsmentioning

confidence: 99%

Spectral assessment of soil properties : standoff quantification of soil organic matter content in surface mineral soils and Alaskan peat

Jarvis¹,

Douglas²,

Foley³

et al. 2017

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Characterization of soil properties typically requires time-intensive, ground-based sampling. Therefore, technologies that allow for rapid assessment of particular attributes would be greatly beneficial. One example is Fourier transform infrared (FTIR) spectroscopy, which uses an infrared spectrum to qualitatively identify a variety of compounds in solid, liquid, or gaseous samples. This study investigated the infrared reflectance signatures of peat and mineral soil samples with varying amounts of organic matter and coupled FTIR spectroscopy with a thermogravimetric analyzer (TGA) to more accurately identify and quantify soil organic matter (SOM). Clear differences were observed between the soil and peat FTIR spectral profiles. When compared to traditional analysis by loss on ignition, the coupled TGA-FTIR method resulted in an underestimation of the percent SOM for peat samples and an overestimation of the percent SOM in mineral soil samples. These results may have been influenced by low sample mass and moisture present in the sample. In total, our project results show that FTIR measurements provide a rapid yet qualitative means of assessing sample organic matter versus mineral content, but the TGA-FTIR measurement capability needs more refinement before it can be used for qualitative SOM measurements.

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“…When a sample with lower refractive index (kaolin sample, in this study) is placed in contact with the ATR crystal, the total internal reflection of the beam of light creates an evanescent wave which penetrates into the sample. This evanescent wave is attenuated in the regions of infrared (IR) spectrum, where the sample transmits (absorbs) energy, and an ATR spectrum is generated [27].…”

Section: Methodsmentioning

confidence: 99%

Fourier Transform Infrared Spectroscopy of Clay Size Fraction of Cretaceous-Tertiary Kaolins in the Douala Sub-Basin, Cameroon

et al. 2017

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Abstract:The structural order of Cretaceous-Tertiary kaolins of the Douala Sub-Basin in Cameroon was determined in this study. This was achieved using Fourier Transform Infrared spectroscopy (FTIR) with attenuated total reflectance (ATR) on the Bomkoul, Dibamba, Ediki, Logbaba, Missole and Yatchika kaolins. Transmittance spectra of 20 samples were recorded in the mid-infrared regions (MIR). Results show that most of the kaolins had the four distinguishable bands in the hydroxyl (OH) stretching region, though the second transmittance band (3670 cm −1 ) had low intensities. The hydroxyl stretching of water bands (3457 and 3442 cm −1 for KGa-1b and KGa-2, respectively) were mainly observed in all Logbaba samples at 3443 cm −1 and 3445 cm −1 . The two bands reflecting OH deformation of inner-surface hydroxyl and inner hydroxyl groups (937 and 915 cm −1 ) were quite visible in the Bomkoul, Dibamba, Logbaba and Missole II samples; slightly visible in all Yatchika and two of the Ediki; and not visible in Missole I and one of the Ediki samples. Therefore, based on the empirical classification of the degree of order of kaolinite, 10 of the studied samples had ordered structures. Three displayed partially ordered structures; four had poorly ordered structures, and three exhibited disordered structures. This study revealed that kaolins from Dibamba, Logbaba and Missole II in the Douala SubBasin had the best crystallinity, which is one of the important characteristics needed for industrial applications.

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Reflectance IR Spectroscopy

Cited by 33 publications

References 4 publications

Examination of the chemical changes in spruce wood degraded by brown-rot fungi using FT-IR and FT-Raman spectroscopy

Examination of the chemical changes in spruce wood degraded by brown-rot fungi using FT-IR and FT-Raman spectroscopy

Spectral assessment of soil properties : standoff quantification of soil organic matter content in surface mineral soils and Alaskan peat

Fourier Transform Infrared Spectroscopy of Clay Size Fraction of Cretaceous-Tertiary Kaolins in the Douala Sub-Basin, Cameroon

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