scholarly journals Determination of Trace Elements in Pumpkin Seeds by X-Ray Fluorescence Analysis and Its Application to Identifying the Geographic Origin of Individual Pumpkins

2012 ◽  
Vol 59 (7) ◽  
pp. 338-347 ◽  
Author(s):  
Akiko Imai ◽  
Akiko Otaka ◽  
Satoru Nakamura ◽  
Masashi Kadokura ◽  
Tadanao Suzuki ◽  
...  
Keyword(s):  
Trace Elements ◽  
Geographic Origin ◽  
Fluorescence Analysis ◽  
X Ray ◽  
Pumpkin Seeds

Slope-Ratio Technique for the Determination of Trace Elements by X-Ray Spectroscopy: A New Approach to Matrix Problems

1968 ◽  
Vol 22 (4) ◽  
pp. 321-324 ◽  
Author(s):  
Frank Cuttitta ◽  
Harry J. Rose
Keyword(s):  
Trace Elements ◽  
Matrix Effects ◽  
Fluorescence Analysis ◽  
Slope Ratio ◽  
New Approach ◽  
X Ray ◽  
Standard Curve ◽  
Residual Matrix ◽  
Matrix Problems

A new approach to solving matrix problems in x-ray fluorescence analysis of trace elements has been applied to the determination of bromine in saline waters and zinc in silicates. The method requires no prior knowledge of the chemical composition of the sample. Marked matrix effects are minimized by dilution, and the problem of variable backgrounds due to residual matrix effects is solved by using a slope-ratio technique. In this proposed technique, the slope of a standard curve prepared from pure solutions is compared with that of spiked samples. The ratio of the slopes of these two curves permits the calculation of an adjusted background which does not significantly differ from that of an absorbent impregnated with the sample matrix free of the element sought. Experimental parameters concerning the technique are presented. The excellent agreement of the zinc and bromine data with analytical results obtained by more conventional methods suggests that the technique can be used for the determination of other trace constituents in geologic materials. Application of the slope-ratio technique to other modes of instrumental analysis appears feasible.

scholarly journals Determination of Trace Elements in Wheat Flour by X-Ray Fluorescence Analysis and Its Application to Identification of Their Production Area

2009 ◽  
Vol 58 (12) ◽  
pp. 1011-1022 ◽  
Author(s):  
Akiko Otaka ◽  
Yoko Yanada ◽  
Akiko Hokura ◽  
Kenji Matsuda ◽  
Izumi Nakai
Keyword(s):  
Trace Elements ◽  
Wheat Flour ◽  
Fluorescence Analysis ◽  
X Ray ◽  
Production Area

Determination of Sulfur, Ash, and trace Element Content of Coal, Coke, and Fly Using Multielement Tube-Excied X-ray Fluorescence Analsis

1976 ◽  
Vol 20 ◽  
pp. 431-436
Author(s):  
J. A. Cooper ◽  
B. D. Wheeler ◽  
G. J. Wolfe ◽  
D. M. Bartell ◽  
D. B. Schlafke
Keyword(s):  
Trace Elements ◽  
Fly Ash ◽  
Trace Element ◽  
Trace Element Content ◽  
Fluorescence Analysis ◽  
Major And Trace Elements ◽  
Average Concentration ◽  
Ash Content ◽  
X Ray

A procedure using tube excited energy dispersive x-ray fluorescence analysis with interelement corrections has been developed for multielement analysis of major and trace elements and ash content of coal, coke, and fly ash. The procedure uses pressed pellets and an exponential correction for interelement effects. The average deviations ranged from about 0.0003% for V at an average concentration of about .003% to 0.1% for S at an average concentration of 4%. About 25 elements were measured and 100 second minimum detectable concentrations ranged from about one part per million for elements near arsenic to about one tenth of one percent for sodium.

scholarly journals Discrimination of Geographic Origin by Trace Elements Contents inRehmannia Radix Preparatusing X-ray Fluorescence Analysis

2015 ◽  
Vol 58 (4) ◽  
pp. 345-348
Author(s):  
Hey-Ree Bae ◽  
Si-Kyung Lee ◽  
In-Jae Whang ◽  
Jeong-Mi Kang ◽  
Jin-Ho Lee ◽  
...  
Keyword(s):  
Trace Elements ◽  
Geographic Origin ◽  
Fluorescence Analysis ◽  
X Ray

scholarly journals The Application of Tunable Monochromatic Synchrotron Radiation to the Quantitative Determination of Trace Elements

1984 ◽  
Vol 28 ◽  
pp. 53-60
Author(s):  
R. D. Giauque ◽  
J. M. Jaklevic ◽  
A. C. Thompson
Keyword(s):  
Trace Elements ◽  
Quantitative Analysis ◽  
High Resolution ◽  
Fluorescence Analysis ◽  
Excitation Energies ◽  
Incident Flux ◽  
Polarization Effects ◽  
X Ray ◽  
Monochromatic Synchrotron

The potential advantages of synchrotron sources for x-ray fluorescence analysis have been discussed by several authors. These advantages include high incident flux, tunable excitation energies using crystal monochromators, and reduction of scattered background due to polarization effects. Minimum detectable limits have both been calculated and measured, and have demonstrated the improvements that can be achieved vising synchrotron sources. In this paper we present results obtained using tunable, monochromatic excitation and a high resolution lithium-drifted silicon, Si(Li), spectrometer for the quantitative analysis of a variety of sample types. Our experiments were designed to investigate the advantages and limitations of tunable monochromatic excitation with respect to optimum sensitivity, accuracy, and elemental selectivity in energy dispersive x-ray fluorescence analysis.

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