Agro-environmental characterization of semi-arid Mediterranean soils using NIR reflection and mid-IR-attenuated total reflection spectroscopies

2014 ◽  
Vol 74 ◽  
pp. 88-97 ◽  
Author(s):  
V. Aranda ◽  
A. Domínguez-Vidal ◽  
F. Comino ◽  
J. Calero ◽  
M.J. Ayora-Cañada
Keyword(s):  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Environmental Characterization ◽  
Mediterranean Soils ◽  
Semi Arid

scholarly journals Detonation Nanodiamonds: A Comparison Study by Photoacoustic, Diffuse Reflectance, and Attenuated Total Reflection FTIR Spectroscopies

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2501
Author(s):  
Dmitry S. Volkov ◽  
Petr K. Krivoshein ◽  
Mikhail A. Proskurnin
Keyword(s):  
Diffuse Reflectance ◽  
Depth Profiling ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Comparison Study ◽  
Absorption Bands ◽  
Full Characterization ◽  
Ftir Spectrometry ◽  
Out Of Plane

The qualitative analysis of nanodiamonds by FTIR spectrometry as photoacoustic (FTIR–PAS), diffuse-reflectance (DRIFT), and attenuated total reflection (ATR) modalities was evaluated for rapid and nondestructive analysis and comparison of nanodiamonds. The reproducibility and signal-gathering depth of spectra was compared. The assignment of characteristic bands showed that only six groups of bands were present in spectra of all the modalities with appropriate sensitivity: 1760 (C=O stretch, isolated carboxyl groups); 1640–1632 (H–O–H bend, liquid water); 1400–1370 (non-carboxyl C–O–H in-plane bend and CH2 deformation); 1103 (non-carboxyl C–O stretch); 1060 (in-plane C–H bend, non-aromatic hydrocarbons and carbohydrates); 940 cm−1 (out-of-plane carboxyl C–O–H bend). DRIFT provides the maximum number of bands and is capable of measuring hydrogen-bonded bands and CHx groups. ATR provides the good sensitivity for water and C–H/C–C bands in the range 2000–400 cm−1. FTIR–PAS reveals less bands than DRIFT but more intense bands than ATR–FTIR and shows the maximum sensitivity for absorption bands that do not appear in ATR-IR spectra and are expedient for supporting either DRIFT or FTIR–PAS along with depth-profiling. Thus, all three modalities are required for the full characterization of nanodiamonds surface functional groups.

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.

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