Chemical Characterization of Obsidians from Different Mediterranean Sources by Non-destructive SEM-EDS Analytical Method

1999 ◽  
Vol 26 (3) ◽  
pp. 315-325 ◽  
Author(s):  
P. Acquafredda ◽  
T. Andriani ◽  
S. Lorenzoni ◽  
E. Zanettin
Keyword(s):  
Analytical Method ◽  
Chemical Characterization ◽  
Non Destructive

Handheld Portable Energy-Dispersive X-Ray Fluorescence Spectrometry (pXRF)

2016 ◽  
pp. 362-381 ◽  
Author(s):  
Elisabeth Holmqvist
Keyword(s):  
Production Systems ◽  
Matrix Effects ◽  
Chemical Characterization ◽  
High Sensitivity ◽  
Limited Range ◽  
Energy Dispersive ◽  
Analytical Sensitivity ◽  
X Ray ◽  
Non Destructive

Handheld portable energy-dispersive X-ray fluorescence (pXRF) spectrometry is used for non-destructive chemical characterization of archaeological ceramics. Portable XRF can provide adequate analytical sensitivity to discriminate geochemically distinct ceramic pastes, and to identify compositional clusters that correlate with data patterns acquired by NAA or other high sensitivity techniques. However, successful non-destructive analysis of unprepared inhomogeneous ceramic samples requires matrix-defined scientific protocols to control matrix effects which reduce the sensitivity and precision of the instrumentation. Quantification of the measured fluorescence intensities into absolute concentration values and detection of light elements is encumbered by the lack of matrix matched calibration and proper vacuum facilities. Nevertheless, semi-quantitative values for a limited range of high Z elements can be generated. Unstandardized results are difficult to validate by others, and decreased analytical resolution of non-destructive surface analysis may disadvantage site-specific sourcing, jeopardize correct group assignments, and lead to under-interpretation of ceramic craft and production systems.

Beyond Death: Forensic Investigations of pre-Columbian Mummies from the Tarapacá Valley, Chile, Using Variable Pressure SEM and Raman Spectroscopy

2007 ◽  
Vol 15 (6) ◽  
pp. 6-11 ◽  
Author(s):  
S.V. Prikhodko ◽  
C. Fischer ◽  
R. Boytner ◽  
M. C. Lozada ◽  
M. Uribe ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Characterization ◽  
Quantitative Information ◽  
Mortuary Practices ◽  
Variable Pressure ◽  
Scientific Investigations ◽  
Non Invasive ◽  
Archaeological Materials ◽  
Non Destructive

Variable pressure scanning electron microscopy (VPSEM) coupled with other non-destructive analytical methods, such as energy dispersive (EDS) and Raman spectroscopy (RS) offers new capabilities for non-invasive imaging and chemical characterization of archaeological materials. This article underlines the application of VPSEM-EDS-RS on bioarchaeological specimens of pre-Columbian mummies from the Tarapacá Valley in northern Chile. The aim of the scientific investigations is to identify nonanatomical features and to provide qualitative and quantitative information at molecular levels, complementing the morphological record from studies in physical anthropology, in an effort to understand mortuary practices in the Tarapacá Valley and the effects of the burial environment in the preservation of mummified human remains.

Durability of a ventilated stone facade: A case study of a limestone facade affected by the corrosion of the anchorage system

2020 ◽  
Author(s):  
Vera Pires de Almeida Ribeiro
Keyword(s):  
Chemical Characterization ◽  
Masonry Walls ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
Correct Execution ◽  
Anchoring System ◽  
Ventilated Facade ◽  
Non Destructive

<p>The mechanical behavior of a natural stone ventilated facade is inevitably based on the correct execution of both anchoring elements, stone cladding and enclosure support, either with brick masonry walls or reinforced concrete walls. In the case studied in the present work, the origin of the damages on the facade of a building located in Lisbon has been analyzed, where stone detachments were starting to occur. This enclosure is a ventilated facade cladded with Portuguese limestone Lioz slabs. Non-destructive borescope analysis of the metallic anchoring system employed was performed, as well as X-Ray fluorescence laboratory analysis (FRX) for chemical characterization of the anchoring material. Results obtained demonstrated the problem cause on the stone facade due to incorrect metallic anchoring selection and poor execution combined with stress corrosion effect, especially for slabs with larger dimensions.</p>

scholarly journals Characterization of medieval-like glass alteration layers by laser spectroscopy and nonlinear optical microscopy

2021 ◽  
Vol 136 (8) ◽  
Author(s):  
Mohamed Oujja ◽  
Teresa Palomar ◽  
Marina Martínez-Weinbaum ◽  
Sagrario Martínez-Ramírez ◽  
Marta Castillejo
Keyword(s):  
Optical Microscopy ◽  
Nonlinear Optical ◽  
Three Dimensional ◽  
Chemical Characterization ◽  
Conservation Strategies ◽  
Cross Sectional ◽  
Nonlinear Optical Microscopy ◽  
Non Destructive ◽  
Ft Raman

AbstractHistorical glass-based objects undergo, since the time of their manufacture, different degradation phenomena that are related to their composition and to the environment to which they were exposed. Three-dimensional (3D) structural and chemical characterization of the degradation layers is important to select the most adequate conservation strategies for glass objects. Optical microscopy (OM) is the most frequently used non-destructive method to examine the surface of historical glasses; however, the 3D structural assessment of alteration layers requires applying the destructive modality of this technique to conduct a cross-sectional study. In this work, a different approach for structural and compositional characterization of alteration layers on model medieval-like glasses is presented, based on the combination of the laser spectroscopies of laser-induced breakdown spectroscopy (LIBS), laser-induced fluorescence (LIF) and FT-Raman, and the emerging, cutting edge technique of nonlinear optical microscopy (NLOM) in the modality of multiphoton excitation fluorescence (MPEF). The results obtained through this multi-analytical photonic approach were compared with those retrieved by examination of the surface and cross sections of the samples by OM and scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM–EDS). While the combination of LIBS, LIF and FT-Raman served to assess the composition of the various alteration layers, the use of MPEF microscopy allowed the non-destructive determination of the thicknesses of these layers, showing for both thickness and composition a good agreement with the OM and SEM–EDS results. Thus, the proposed approach, which avoids sample preparation, illustrates the capability of non-destructive, or micro-destructive in the case of LIBS, laser spectroscopies and microscopies for the in situ study of glass objects of historic or/and artistic value. Graphic Abstract

Standardization of an external (in air) PIGE methodology using tantalum as a current normalizer in conjunction with INAA for rapid and non-destructive chemical characterization of “as-received” glass fragments towards forensic applications

2021 ◽  
Author(s):  
V. Sharma ◽  
R. Acharya ◽  
Hemlata K. Bagla ◽  
P. K. Pujari
Keyword(s):  
Trace Elements ◽  
Chemical Characterization ◽  
Minor And Trace Elements ◽  
Destructive Analysis ◽  
Automobile Glass ◽  
Non Destructive ◽  
A Current

Rapid automobile glass forensics by non-destructive analysis of “as-received” samples by external (in-air) PIGE for low Z elements with tantalum as a current normalizer and INAA for minor and trace elements using reactor neutrons.

Non-destructive chemical characterization of ceramic sherds from Shipwreck 31CR314 and Brunswick Town, North Carolina

2008 ◽  
Vol 35 (10) ◽  
pp. 2824-2838 ◽  
Author(s):  
Lisa S. Schleicher ◽  
J. William Miller ◽  
Sarah C. Watkins-Kenney ◽  
Linda F. Carnes-McNaughton ◽  
Mark U. Wilde-Ramsing
Keyword(s):  
North Carolina ◽  
Chemical Characterization ◽  
Non Destructive

Development of a hydrophilic interaction liquid chromatography (HILIC) method for the chemical characterization of water-soluble isoprene epoxydiol (IEPOX)-derived secondary organic aerosol

2018 ◽  
Vol 20 (11) ◽  
pp. 1524-1536 ◽  
Author(s):  
Tianqu Cui ◽  
Zhexi Zeng ◽  
Erickson O. dos Santos ◽  
Zhenfa Zhang ◽  
Yuzhi Chen ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Analytical Method ◽  
Secondary Organic Aerosol ◽  
Chemical Characterization ◽  
Organic Aerosol ◽  
Water Soluble ◽  
Hydrophilic Interaction Liquid Chromatography ◽  
Hydrophilic Interaction ◽  
Thermal Analytical Method

A developed non-thermal analytical method effectively resolves and quantifies major IEPOX-SOA components in PM2.5.

Non-Destructive Sub-Surface Chemical Characterization of Air-Exposed Plasma Polymers by Energy-Resolved XPS

2009 ◽  
Vol 7 (6) ◽  
pp. 474-481 ◽  
Author(s):  
Pierre-Luc Girard-Lauriault ◽  
Iris Retzko ◽  
Sufal Swaraj ◽  
Nobuyuki Matsubayashi ◽  
Thomas Gross ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Surface Chemical ◽  
Plasma Polymers ◽  
Non Destructive
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