scholarly journals Portable grazing exit X-ray fluorescence system using a low-power X-ray tube

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
Ramon Silva Dos Santos ◽  
Davi Ferreira De Oliveira ◽  
Joaquim Teixeira De Assis ◽  
Marcelino José Dos Anjos
Keyword(s):  
Low Power ◽  
Low Cost ◽  
Trace Elemental Analysis ◽  
X Ray ◽  
First Results ◽  
Trace Elemental ◽  
Portable System ◽  
Sample Support ◽  
Relative Errors ◽  
Certified Values

In this work was developed a portable system of grazing exit X-ray fluorescence (geometric 90° - 0°) that can be applied in several areas science and technology. GE-XRF portable system is formed by a mini X-ray tube of low power (anode of Au) and a SiPIN detector. The reflectors used as sample support (sampler carrier) were quartz discs. The grazing exit angle was experimentally determined by measuring a cooper solution (10 μg.g-1). The accuracy of the system was checked using multielement reference solution as standard reference material. The relative errors between measured and certified values are in the range of 4 to 19%. The first results showed a background was drastically reduced at grazing exit angles, enabling trace elemental analysis. The system of GE-XRF proved to be quite stable and reproducible. This paper shows that it is possible to produce a portable system of grazing exit X-ray fluorescence compact, efficient, low-cost and easy-to-handle instrumentation using a low power X-ray tube and a SiPIN compact detector.

scholarly journals The Bionanoprobe: hard X-ray fluorescence nanoprobe with cryogenic capabilities

2013 ◽  
Vol 21 (1) ◽  
pp. 66-75 ◽  
Author(s):  
S. Chen ◽  
J. Deng ◽  
Y. Yuan ◽  
C. Flachenecker ◽  
R. Mak ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Natural State ◽  
Preparation Methods ◽  
X Ray ◽  
Whole Cells ◽  
Fluorescence Nanoprobe ◽  
First Results ◽  
Trace Elemental ◽  
Radiation Induced ◽  
Cellular Water

Hard X-ray fluorescence microscopy is one of the most sensitive techniques for performing trace elemental analysis of biological samples such as whole cells and tissues. Conventional sample preparation methods usually involve dehydration, which removes cellular water and may consequently cause structural collapse, or invasive processes such as embedding. Radiation-induced artifacts may also become an issue, particularly as the spatial resolution increases beyond the sub-micrometer scale. To allow imaging under hydrated conditions, close to the `natural state', as well as to reduce structural radiation damage, the Bionanoprobe (BNP) has been developed, a hard X-ray fluorescence nanoprobe with cryogenic sample environment and cryo transfer capabilities, dedicated to studying trace elements in frozen-hydrated biological systems. The BNP is installed at an undulator beamline at sector 21 of the Advanced Photon Source. It provides a spatial resolution of 30 nm for two-dimensional fluorescence imaging. In this first demonstration the instrument design and motion control principles are described, the instrument performance is quantified, and the first results obtained with the BNP on frozen-hydrated whole cells are reported.

scholarly journals Review on Mineral Characterization of Precambrian Charnockites – using PIXE Technique

2020 ◽  
Author(s):  
Avupati Venkata Surya Satyanarayana ◽  
Mokka Jagannadharao ◽  
Kemburu Chandra Mouli ◽  
Kollu Sai Satya Mounika
Keyword(s):  
Long Range ◽  
Elemental Analysis ◽  
Major Elements ◽  
Analytical Tool ◽  
Trace Elemental Analysis ◽  
X Ray ◽  
Trace Elemental ◽  
Mineral Characterization ◽  
Non Destructive

Abstract. Particle Induced X-ray Emission (PIXE) has been applied to a analytical tool for long range of major, minor and trace elemental analysis in Precambrian charnockites. PIXE is sensitive and non-destructive method for some elemental analysis in a variety of Precambrian charnockite rocks down to levels of a few parts per million and it is not valid for all remaining elements in the composition. The elements identified in the Precambrian charnokite rock are Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Se, Br, Rb, Sr, Y, Zr, Nb, Mo, Ru, Ag, Pb are identified without exact values by PIXE but the elements minor F, major elements Na, Mg, Al, Si, P and Ba and traces of Co, Th and U not detected due to various reasons even though there present in the charnockites, because of PIXE which is operation at 3 MeV energy and characterization material of charnockite mineral investigated. In mineral characterization of charnockite rocks, elemental errors in concentration of the compositions explained by comparing with present and previous studies.

scholarly journals An Internet of Things (IoT) Application on Volcano Monitoring

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4651 ◽  
Author(s):  
Shadia Awadallah ◽  
David Moure ◽  
Pedro Torres-González
Keyword(s):  
Internet Of Things ◽  
Low Power ◽  
Low Cost ◽  
Thermal Anomaly ◽  
Raspberry Pi ◽  
Area Network ◽  
Wide Area Network ◽  
Volcanic Surveillance ◽  
First Results ◽  
Network Operation

In the last few years, there has been a huge interest in the Internet of Things (hereinafter IoT) field. Among the large number of IoT technologies, the low-power wide-area network (hereinafter LPWAN) has emerged providing low power, low data-rate communication over long distances, enabling battery-operated devices to operate for long time periods. This paper introduces an application of long-range (hereinafter LoRa) technology, one of the most popular LPWANs, to volcanic surveillance. The first low-power and low-cost wireless network based on LoRa to monitor the soil temperature in thermal anomaly zones in volcanic areas has been developed. A total of eight thermometers (end devices) have been deployed on a Teide volcano in Tenerife (Canary Islands). In addition, a repeater device was developed to extend the network range when the gateway did not have a line of sight connection with the thermometers. Combining LoRa communication capabilities with microchip microcontrollers (end devices and repeater) and a Raspberry Pi board (gateway), three main milestones have been achieved: (i) extreme low-power consumption, (ii) real-time and proper temperature acquisition, and (iii) a reliable network operation. The first results are shown. These results provide enough quality for a proper volcanic surveillance.

scholarly journals Discriminant Analysis ofUndaria pinnatifidaProduction Areas Using Trace Elemental Analysis

2010 ◽  
Vol 2010 ◽  
pp. 1-9
Author(s):  
Mikio Kaihara
Keyword(s):  
Elemental Analysis ◽  
Near Infrared ◽  
Fluorescence Analysis ◽  
Spongiform Encephalopathy ◽  
Trace Elemental Analysis ◽  
X Ray ◽  
Trace Elemental ◽  
Simple Sampling ◽  
Sampling Procedures ◽  
Agricultural Materials

Increasingly, attention is being paid to declaring the origin of agricultural and marine products after the advent of the bovine spongiform encephalopathy (BSE; commonly known as mad-cow disease). The display of the production centers onU. pinnatifidahas been required in Japan since 2006. As an example of testing in another marine product, near-infrared spectra (NIR) and trace elemental analysis ofU. pinnatifidaare proven effective methods for discriminating production centers by us and Food and Agricultural Materials Inspection Center (FAMIC). In the present study, we found that X-ray fluorescence analysis of Br was also effective for the discrimination of production centers. The results of our study suggest that a combination of NIR and X-ray fluorescence analysis is a convenient and efficient method for determination due simple sampling procedures and increased effectiveness.

scholarly journals Trace Elemental Analysis of Illicit Methamphetamines Using Total Reflection X-Ray Fluorescence Spectroscopy

1999 ◽  
Vol 45 (3) ◽  
pp. 166-171 ◽  
Author(s):  
Seiji Muratsu ◽  
Sadao Fukui ◽  
Toyonaga Maeda ◽  
Tohru Matsushita ◽  
Hiromu Hasegawa ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Elemental Analysis ◽  
Total Reflection ◽  
Trace Elemental Analysis ◽  
X Ray ◽  
Trace Elemental
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