Review of in situ X‐ray fluorescence analysis technology in China

2019 ◽  
Vol 49 (4) ◽  
pp. 458-470 ◽  
Author(s):  
Liangquan Ge ◽  
Fei Li
Keyword(s):  
Fluorescence Analysis ◽  
X Ray

scholarly journals Synchrotron radiation microbeam X-ray fluorescence analysis of zinc concentration in remineralized enamel in situ

2009 ◽  
Vol 54 (5) ◽  
pp. 420-423 ◽  
Author(s):  
Tsunenori Matsunaga ◽  
Hidetaka Ishizaki ◽  
Shuji Tanabe ◽  
Yoshihiko Hayashi
Keyword(s):  
Synchrotron Radiation ◽  
Zinc Concentration ◽  
Fluorescence Analysis ◽  
X Ray

scholarly journals X-Ray Fluorescence Analysis of a Gold Ibex and other Artifacts from Akrotiri

2019 ◽  
Vol 11 ◽  
Author(s):  
A. G. Karydas ◽  
T. Pantazis ◽  
C. Doumas ◽  
A. Vlachopoulos ◽  
P. Nomikos ◽  
...  
Keyword(s):  
Bulk Composition ◽  
Fluorescence Analysis ◽  
Wall Painting ◽  
Inorganic Elements ◽  
X Ray ◽  
Wide Range ◽  
Soldering Technology ◽  
Excavation Area

In-situ X-ray fluorescence analysis (XRF) of ancient artifacts from the excavation area was performed using a novel X-ray instrumentation, composed of a portable silicon PIN thermoelectrically cooled X-ray detector, a miniature X-ray source, and portable data acquisition devices. The main objective of the analyses in Akrotiri was to explore the potential of the technique to provide answers to a wide range of archaeometric questions regarding the bulk composition of metal alloys, especially of gold, the characterization of corrosion products in bronze artifacts, identification of inorganic elements which are fingerprints of the minerals used in wall-painting pigments, and of the painting materials and techniques used for the decoration of clay vase surfaces. Among the analysed artifacts are a unique gold ibex, a bronze dagger and blade, various pigments from the wall paintings of room 3 in Xeste 3, decoration pigments from rosettes of faience, a bichrome jug, and other clay vases. The results of the in-situ XRF survey, primarily those of the bulk composition and soldering technology of the gold ibex, are discussed and compared with literature.

scholarly journals Quantification of Chlorides and Sulphates on Concrete Surfaces Using Portable X-ray Fluorescence. Optimization of the Measurement Method Using Monte Carlo Simulation

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7892
Author(s):  
Servando Chinchón-Payá ◽  
Julio E. Torres Martín ◽  
Antonio Silva Toledo ◽  
Javier Sánchez Montero
Keyword(s):  
Monte Carlo ◽  
Coarse Aggregate ◽  
Fluorescence Analysis ◽  
Concrete Surface ◽  
Mean Value ◽  
Reinforced Concrete Structure ◽  
X Ray ◽  
Qualitative Estimate ◽  
Repair Procedure

A correct assessment of the pathologies that can affect a reinforced concrete structure is required in order to define the repair procedure. This work addresses the challenge of quantifying chlorides and sulphates directly on the surface of concrete. The quantification was carried out by means of X-ray fluorescence analysis on the surface of concrete specimens at different points with portable equipment. Concrete prisms were made with different amounts of NaCl and Na2SO4. To avoid the influence of coarse aggregate, a qualitative estimate of the amount of coarse aggregate analyzed has been made, although the results show that there is no significant influence. Monte Carlo simulations were carried out in order to establish the necessary number of random analyses of the mean value to be within an acceptable range of error. In the case of quantifying sulphates, it is necessary to carry out six random analyses on the surface, and eight measurements in the case of quantifying chlorides; in this way, it is ensured that errors are below 10% in 95% of the cases. The results of the study highlight that a portable XRF device can be used in situ to obtain concentrations of chlorides and sulphates of a concrete surface with good accuracy. There is no need to take samples and bring them to a laboratory, allowing lower overall costs in inspection and reparation works.

An X-Ray Spectrometer Attachment for the Philips EM-200/EM-300 Electron Microscopes

1968 ◽  
Vol 26 ◽  
pp. 310-311
Author(s):  
R. E. Ogilvie ◽  
S. H. Moll ◽  
M. A. Schippert
Keyword(s):  
Crystal Structure ◽  
Electron Microscope ◽  
Fluorescence Analysis ◽  
Angular Range ◽  
X Ray ◽  
Mica Crystal ◽  
Electron Microscopes ◽  
Present Ability

An X-ray spectrometer has been developed to extend the analytical capability of the Philips EM-200/EM-300 Electron Microscopes to studies of sample chemistry. It attaches directly to the objective aperture port of the rotating/tilting specimen stage.Shown in Figure 1, the spectrometer is a high resolution instrument, employing a mica crystal which is continuously curved to fulfill the X-ray focusing conditions over the entire angular range. Equipped with a flow proportional counter, it is capable of analyzing characteristic X-ray lines of any element from Na through U. With the rotating/tilting specimen stage and a replacement aperture installed in the microscope, the spectrometer may be attached to or removed from the instrument in less than five minutes. It may also be left in situ during normal use of the microscope.Supplementing the present ability of the electron microscope to investigate morphology and crystal structure (by electron diffraction), the spectrometer allows the simultaneous determination of chemical composition by microprobe X-ray fluorescence analysis of areas approximately one micron in diameter.

Enhancing the Science Return of Landed X-ray Spectrometers on the Mars Rovers

2020 ◽  
Author(s):  
Scott VanBommel ◽  
Ralf Gellert
Keyword(s):  
Solar System ◽  
Fluorescence Analysis ◽  
Future Application ◽  
Computational Techniques ◽  
Science Laboratory ◽  
X Ray ◽  
Analysis Techniques ◽  
New Methods ◽  
Mars Exploration Rovers

<p>Alpha Particle X-ray Spectrometers (APXS) have flown on the Mars Exploration Rovers (MER) <em>Spirit</em> and <em>Opportunity</em> as well as the Mars Science Laboratory (MSL) rover <em>Curiosity</em>. The APXS was designed and calibrated for in situ interrogation of solid martian samples through the use of complementary particle-induced X-ray emission and X-ray fluorescence analysis techniques. Its compact and robust design, combined with low power and data demand, further suit the APXS instrument and method for lengthy missions to the surface of rocky bodies in our solar system. Since their three respective landings, the science derived from the latest APXS instruments has been expanded beyond its original scope through the integration of computational techniques and modest changes to how the instrument is utilized on Mars. We will discuss these new methods, operational considerations, as well as the enhanced science achieved, with a particular focus on the relevance and future application on the surface of Mars.</p>

scholarly journals IN SITU X-RAY FLUORESCENCE ANALYSIS OF ROCK ART PAINTINGS ALONG THE COAST AND VALLEYS OF THE ATACAMA DESERT, NORTHERN CHILE

2015 ◽  
Vol 60 (1) ◽  
pp. 2822-2826 ◽  
Author(s):  
MARCELA SEPÚLVEDA ◽  
SEBASTIAN GUTIERREZ ◽  
JOSÉ CARCAMO ◽  
ADRIAN OYANEDER ◽  
DANIELA VALENZUELA ◽  
...  
Keyword(s):  
Rock Art ◽  
Atacama Desert ◽  
Fluorescence Analysis ◽  
Northern Chile ◽  
X Ray
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