The Presence and Role of Paramagnetic Impurities in the Degradation of Paper

1996 ◽  
Vol 462 ◽  
Author(s):  
Donato Attanasio ◽  
Donatella Capitani ◽  
Maria C. Emanuele
Keyword(s):  
Electron Spin Resonance ◽  
Point Defects ◽  
Systematic Investigation ◽  
Electron Spin Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Paramagnetic Impurities ◽  
Quantitative Monitoring ◽  
Spin Resonance ◽  
Paramagnetic Centres

ABSTRACTElectron Spin Resonance spectroscopy has been used to carry out a systematic investigation of the paramagnetic impurities present in antique and modern paper. Up to eleven different paramagnetic centres, which include different transition ions (Fe3+, Mn2+, Cu2+), organic free radicals, and paramagnetic point defects have been detected, in concentrations ranging from few ppm to several hundreds. Experiments performed on new and deteriorated samples strongly indicate that some of these impurities participate directly or are produced during the aging and degradation processes. They can be used as quality indicators or probes for quantitative monitoring of the degradation of paper.

Electron Spin Resonance Characterization and Provenance of Marbles: The Case of the “Cipollino Verde”

1996 ◽  
Vol 462 ◽  
Author(s):  
Giovanna Armiento ◽  
Donato Attanasio ◽  
Rosario Platania
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Quantitative Information ◽  
Electron Spin Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Qualitative And Quantitative ◽  
Paramagnetic Impurities ◽  
Spin Resonance ◽  
Sample Case

ABSTRACTThe possibility of using Electron Spin Resonance Spectroscopy (ESR) for identifying the quarries of provenance of classical marble artifacts has been reexamined and applied to the sample case of the so-called “Cipollino Verde” marble. The method gives qualitative and quantitative information on Mn2+ and other paramagnetic impurities present in marble and the assignment is made on a statistical basis, using a properly defined database. Like other, well established, techniques, ESR seldom yields an unequivocal answer to the provenance problem. However, it provides valuable information and, coupled with other methods, reduces the existing uncertainties often leading to the final assignment.

Identification of irradiated rice noodles by electron spin resonance spectroscopy

2012 ◽  
Vol 47 (8) ◽  
pp. 640-643 ◽  
Author(s):  
Wanwisa Sudprasert ◽  
Sahakan Monthonwattana ◽  
Arag Vitittheeranon
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Electron Spin Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Spin Resonance
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