A constant-pressure fiber attenuated total reflection probe for infra-red spectrum analysis

2016 ◽  
Author(s):  
Ruoyuan Qu ◽  
Ligang Wang ◽  
Xiang Feng ◽  
Kan Wu ◽  
Weiwen Zou ◽  
...  
Keyword(s):  
Spectrum Analysis ◽  
Constant Pressure ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Infra Red ◽  
Reflection Probe

Constant Pressure Fiber Attenuated Total Reflection Probe Used in Infrared Spectrum Analysis

2017 ◽  
Vol 37 (5) ◽  
pp. 0506003 ◽  
Author(s):  
屈若媛 Qu Ruoyuan ◽  
侯立平 Hou Liping ◽  
冯 翔 Feng Xiang ◽  
王志吉 Wang Zhiji ◽  
吴 侃 Wu Kan ◽  
...  
Keyword(s):  
Infrared Spectrum ◽  
Spectrum Analysis ◽  
Constant Pressure ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Reflection Probe

scholarly journals Paint Relics on Middle Age Building Stones as Proxies of Commercial Routes and Artistic Exchanges: A Multi-Analytical Investigation

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 663 ◽  
Author(s):  
Scrivano ◽  
Gaggero ◽  
Volpe
Keyword(s):  
Middle Ages ◽  
Middle Age ◽  
Analytical Investigation ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Building Stones ◽  
Yellow Paint ◽  
Infra Red ◽  
The Middle Ages

Fifty-four pieces out of 356 marble pieces deriving from the decorative and architectonic apparatus of the medieval monastic complex of S. Francesco of Castelletto (Genoa, Italy) preserve traces of varicolored paint layers. Microscopic samples of green, blue, red, pink, white, and yellow paint relics were collected by scalpel and analyzed by means of Scanning Electron Microscope coupled with Energy Dispersive Spectroscopy (SEM-EDS), µ-Raman, and Fourier Transform Infra-Red Spectroscopy with Attenuated Total Reflection (FTIR-ATR), to characterize pigments and binders. The combined results from the different techniques allowed verification that stone decoration in Genoa during the Middle Ages encompassed a calcite groundwork and the use of a mixture of oils and proteins (probably egg) to apply pigments. The assemblage of impurities within the pigment has been correlated with the provenance sites along the commercial continental (Hungary and France) and maritime (Sardinia, Cyprus, or Veneto) routes between the 13th and 15th centuries. Moreover, the investigation of the painted layer improved the characterization of the decorative techniques in use in Genoa during the Middle Ages.

In Vivo Behavior of Hydroxyapatite Evaluated by Attenuated Total Reflection Infrared Microscopy (ATR-FTIR)

2008 ◽  
Vol 396-398 ◽  
pp. 61-64 ◽  
Author(s):  
Monica Calasans-Maia ◽  
Silvia R. A. Santos ◽  
Antonella M. Rossi ◽  
José Mauro Granjeiro
Keyword(s):  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Infrared Microscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infra Red ◽  
Infrared Microscope ◽  
Synthetic Hydroxyapatite ◽  
Biological Environment

The study aimed the evaluation of the effect of osseous repair in the synthetic hydroxyapatite cylinder (HA) implanted in rabbit’s tibia. Fifteen adult animals, weighing around 2.5 and 3.0 Kg, sourced by the Fluminense Federal University Animal Lab were anesthetized with spinal anesthesia, and two perforations were created in right tibia and filled with cylinders (2 x 6 mm) of HA. The animals were killed after 28 days for evaluating the HA cylinder through attenuated total reflection infrared microscopy (ATR-FTIR). The two fragments of tibia with the cylinder were collected and fixed in alcohol 70° prior to dehydration in successive alcohol solutions and then impregnated and embedded in methyl-methacrylate. Not stained neither pasted to lamina, sections of 200 µm thickness were analyzed in a Shimadzu IRPrestige-21 Automatic Infrared Microscope (AIM-8800) with ATR Objective Mirror (ATR-8800M). Prior to implantation, HA cylinder was characterized by X-Ray diffraction (XRD), Attenuated Total Reflection- Infra Red microscopy (ATR-FTIR) and X-Ray Fluorescence (XRF). After the implantation, the spectrum of the ATR-FTIR at the interface to neoformed bone was acquired. The hydroxyapatite synthesized was crystalline and stoichiometric with Ca/P ratio of 1.66, becoming carbonated after 28 days of implantation. We conclude that attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) is a useful tool for biomaterial evaluation and able to detect the modification of the chemical HA cylinder pattern occurred probably by ions migration in the biological environment.

Gas Cell Infrared and Attenuated Total Reflection Infrared Spectroscopic Studies for Organic–Inorganic Interactions in Adsorption of Fulvic Acid on the Goethite Surface Generating Carbon Dioxide

2021 ◽  
pp. 000370282199121
Author(s):  
Yuki Nakaya ◽  
Satoru Nakashima ◽  
Takahiro Otsuka
Keyword(s):  
Carbon Dioxide ◽  
Activation Energy ◽  
Fulvic Acid ◽  
Spectroscopic Studies ◽  
Reaction Model ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Gas Cell ◽  
Rate Determining Step ◽  
Ir Spectroscopic

The generation of carbon dioxide (CO2) from Nordic fulvic acid (FA) solution in the presence of goethite (α-FeOOH) was observed in FA–goethite interaction experiments at 25–80 ℃. CO2 generation processes observed by gas cell infrared (IR) spectroscopy indicated two steps: the zeroth order slower CO2 generation from FA solution commonly occurring in the heating experiments of the FA in the presence and absence of goethite (activation energy: 16–19 kJ mol–1), and the first order faster CO2 generation from FA solution with goethite (activation energy: 14 kJ mol–1). This CO2 generation from FA is possibly related to redox reactions between FA and goethite. In situ attenuated total reflection infrared (ATR-IR) spectroscopic measurements indicated rapid increases with time in IR bands due to COOH and COO– of FA on the goethite surface. These are considered to be due to adsorption of FA on the goethite surface possibly driven by electrostatic attraction between the positively charged goethite surface and negatively charged deprotonated carboxylates (COO–) in FA. Changes in concentration of the FA adsorbed on the goethite surface were well reproduced by the second order reaction model giving an activation energy around 13 kJ mol–1. This process was faster than the CO2 generation and was not its rate-determining step. The CO2 generation from FA solution with goethite is faster than the experimental thermal decoloration of stable structures of Nordic FA in our previous report possibly due to partial degradations of redox-sensitive labile structures in FA.

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