Report on Available Standard Samples, Reference Samples, and High-Purity Materials for Spectrochemical Analysis 1963

1963 ◽  
Keyword(s):  
High Purity ◽  
Spectrochemical Analysis ◽  
Standard Samples ◽  
Reference Samples

scholarly journals Samples of concrete of small sizes

2019 ◽  
Vol 91 ◽  
pp. 02043
Author(s):  
Andrew Varlamov ◽  
Sergey Tverskoi ◽  
Vadim Gavrilov
Keyword(s):  
Reinforced Concrete ◽  
Strain State ◽  
Concrete Structures ◽  
Small Samples ◽  
Reinforced Concrete Structures ◽  
Standard Samples ◽  
Stress Strain ◽  
Strength And Deformation ◽  
Loss Of Strength ◽  
Reference Samples

The article analyzes the sizes of concrete samples. We revealed a possibility to reduce sizes of samples. We simultaneously carried out tests of standard and small (25x25x100 mm) concrete samples. Small samples were obtained by cutting standard samples. In the course of study, the density, strength, and deformation of standard and small specimens were measured. The results are presented in tables and graphs. The strength of small samples was lower than the strength of reference samples. We identified loss of strength of the samples when cutting concrete. The average characteristics of deformation of concrete remained. Small samples are recommended for use in assessing the stress-strain state of reinforced concrete structures.

scholarly journals Determination of Trace Element Quantities in Ultra High-Purity Iron by Spectrochemical Analysis after Chemical Separation

2002 ◽  
Vol 43 (2) ◽  
pp. 105-110 ◽  
Author(s):  
Kunio Takada ◽  
Tetsuya Ashino ◽  
Toshiko Itagaki ◽  
Yukitoshi Morimoto ◽  
Kazuaki Wagatsuma ◽  
...  
Keyword(s):  
Trace Element ◽  
High Purity ◽  
Chemical Separation ◽  
Spectrochemical Analysis ◽  
Ultra High Purity ◽  
Purity Iron ◽  
High Purity Iron

Evaluating Indirectly the X-Ray Tube Spectra on the Basis of the Fundamental Parameter Method in Wavelength-Dispersive X-Ray Spectrometry

1993 ◽  
Vol 37 ◽  
pp. 689-696 ◽  
Author(s):  
I. Szalóki ◽  
B. Magyar
Keyword(s):  
Parameter Method ◽  
Fundamental Parameter ◽  
Standard Samples ◽  
Efficiency Function ◽  
Simultaneous Application ◽  
X Ray ◽  
Calibration Methods ◽  
The Relationship ◽  
Fundamental Parameter Method ◽  
Reference Samples

Several calibration methods and empirical formulae have been developed so far for analyzing materials quantitatively in XRF spectrometry. Many of them require reference samples to determine the relationship between the characteristic intensities of the elements and their concentrations. In order to eliminate empirical and semiempirical procedures, the fundamental parameter method (FPM) has been developed, which is one of the most helpful evaluating tools in quantitative XRF analysis. Some interpretations of this approach have the advantage that no standard samples are needed. The simultaneous application of FPM and polychromatic excitation demand an exact mathematical description of the primary spectral distribution as well as the efficiency function of the detector system.

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