scholarly journals Analysis of trace elements in human hair through X-ray fluorescence spectroscopy for screening of prostate cancer

2020 ◽  
Author(s):  
Majid Ghanbari Birgani ◽  
Reza Reiazi ◽  
Mahdieh Afkhami Ardekani ◽  
Hamed Ghaffari ◽  
Ali Shakeri-Zadeh ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Trace Elements ◽  
Fluorescence Spectroscopy ◽  
Human Hair ◽  
X Ray

A rapid, multisample technique for detection of trace elements in trees by energy-dispersive X-ray fluorescence spectroscopy

1987 ◽  
Vol 17 (9) ◽  
pp. 1124-1130 ◽  
Author(s):  
L. E. Maclauchlan ◽  
J. H. Borden ◽  
M. R. Cackette ◽  
J. M. D'Auria
Keyword(s):  
Trace Elements ◽  
Fluorescence Spectroscopy ◽  
Arsenic Content ◽  
Phloem Tissue ◽  
X Ray ◽  
Airborne Pollutants ◽  
Pollution Levels ◽  
Minimal Sample ◽  
Lead And Zinc ◽  
Lodgepole Pines

A new method is presented for studying the distribution of trace elements in trees. A tree core is removed, sectioned into very thin slices (≤400 μm), and analyzed directly using X-ray fluorescence spectroscopy. The technique offers a number of advantages, including minimal sample preparation time, elimination of contamination or leaching, and rapid simplified data analysis. Analysis of 10 or more samples per annual ring is possible. Application of the technique in two studies (first, using trees as indicators of airborne pollutants and second, analyzing pesticide residues in trees) is described. In the first study there were significant correlations between seasonal airborne pollution levels and the levels of lead and zinc detected in the phloem tissue of red alder, Alnusrubra Bong. In the other study, the technique was used to analyze arsenic content in lodgepole pines, Pinuscontorta var. latifolia Englemann, treated with monosodium methanearsonate. Vertical arsenic profiles in treated trees indicated accumulations of arsenic near the site of injection at the base of the bole and in the foliage. Differential radial uptake was also apparent.

scholarly journals Simple and reliable determination of Zn and some additional elements in seminal plasma samples by using total reflection X-ray fluorescence spectroscopy

2020 ◽  
Vol 12 (40) ◽  
pp. 4899-4905
Author(s):  
Eva Marguí ◽  
Jerka Dumić ◽  
Ignasi Queralt ◽  
Lada Baković ◽  
Jasna Jablan
Keyword(s):  
Trace Elements ◽  
Fluorescence Spectroscopy ◽  
Sperm Quality ◽  
Critical Role ◽  
Total Reflection ◽  
Plasma Samples ◽  
Reliable Determination ◽  
X Ray ◽  
Normal Spermatogenesis

Trace elements are essential for the normal spermatogenesis of mammals and play a critical role in sperm quality and pathological processes e.g. inflammation..

Determination of trace elements in Italian wines by means of total reflection X-ray fluorescence spectroscopy

2015 ◽  
Vol 95 (13) ◽  
pp. 1208-1218 ◽  
Author(s):  
Rogerta Dalipi ◽  
Laura Borgese ◽  
Annalisa Zacco ◽  
Kouichi Tsuji ◽  
Emanuele Sangiorgi ◽  
...  
Keyword(s):  
Trace Elements ◽  
Fluorescence Spectroscopy ◽  
Total Reflection ◽  
X Ray

Human-hair analysis

1992 ◽  
Vol 50 (1) ◽  
pp. 886-887
Author(s):  
Brenda E. Lambert ◽  
Ernest C. Hammond
Keyword(s):  
Human Hair ◽  
Hair Analysis ◽  
Hair Shaft ◽  
White Female ◽  
Chemical Processing ◽  
X Ray ◽  
Hair Samples ◽  
Wave Technique ◽  
Permanent Wave ◽  
Scanning Electron

The purpose of this study was to examine the external structure of four human hair shaft samples with the scanning Electron Microscope (SEM) and to obtain information regarding the chemical composition of hair by using the attached x ray microanalysis unit.The hair samples were obtained from two female subjects. Sample A was taken from a black female and had not undergone any type of chemical processing. Sample B, C, D were taken from a white female, and were natural, processed, and unpigmented, i.e. “gray”, respectively. Sample C had been bleached, tinted, and chemically altered using a permanent wave technique.

Microanalytical Identification of a New Zr-Nb-Fe Phase

1990 ◽  
Vol 48 (2) ◽  
pp. 132-133
Author(s):  
O.T. Woo ◽  
G.J.C. Carpenter
Keyword(s):  
Trace Elements ◽  
Cold Rolling ◽  
Proportionality Factor ◽  
Tube Material ◽  
X Ray ◽  
Metal Foils ◽  
Arc Melting ◽  
Intermetallic Particles ◽  
Intermetallic Precipitates ◽  
Cold Worked

To study the influence of trace elements on the corrosion and hydrogen ingress in Zr-2.5 Nb pressure tube material, buttons of this alloy containing up to 0.83 at% Fe were made by arc-melting. The buttons were then annealed at 973 K for three days, furnace cooled, followed by ≈80% cold-rolling. The microstructure of cold-worked Zr-2.5 at% Nb-0.83 at% Fe (Fig. 1) contained both β-Zr and intermetallic precipitates in the α-Zr grains. The particles were 0.1 to 0.7 μm in size, with shapes ranging from spherical to ellipsoidal and often contained faults. β-Zr appeared either roughly spherical or as irregular elongated patches, often extending to several micrometres.The composition of the intermetallic particles seen in Fig. 1 was determined using Van Cappellen’s extrapolation technique for energy dispersive X-ray analysis of thin metal foils. The method was employed to avoid corrections for absorption and fluorescence via the Cliff-Lorimer equation: CA/CB = kAB · IA/IB, where CA and CB are the concentrations by weight of the elements A and B, and IA and IB are the X-ray intensities; kAB is a proportionality factor.

XRMF applications of a monolithic, polycapillary, focusing x-ray optic

1996 ◽  
Vol 54 ◽  
pp. 240-241
Author(s):  
D. A. Carpenter ◽  
Ning Gao ◽  
G. J. Havrilla
Keyword(s):  
Trace Elements ◽  
Point Source ◽  
Focal Spot ◽  
Fluorescence Analysis ◽  
X Rays ◽  
Focal Distance ◽  
Spot Diameter ◽  
X Ray ◽  
Focal Spot Diameter

A monolithic, polycapillary, x-ray optic was adapted to a laboratory-based x-ray microprobe to evaluate the potential of the optic for x-ray micro fluorescence analysis. The polycapillary was capable of collecting x-rays over a 6 degree angle from a point source and focusing them to a spot approximately 40 µm diameter. The high intensities expected from this capillary should be useful for determining and mapping minor to trace elements in materials. Fig. 1 shows a sketch of the capillary with important dimensions.The microprobe had previously been used with straight and with tapered monocapillaries. Alignment of the monocapillaries with the focal spot was accomplished by electromagnetically scanning the focal spot over the beveled anode. With the polycapillary it was also necessary to manually adjust the distance between the focal spot and the polycapillary.The focal distance and focal spot diameter of the polycapillary were determined from a series of edge scans.

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