Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Yu. G. Lavrent'ev"'
Autor:
L. V. Usova, Yu. G. Lavrent'ev
Publikováno v:
Russian Geology and Geophysics. 62:1209-1213
—The basic software package of a JXA-8230 microanalyzer, like its predecessor JXA-8100, uses the long-established ZAF correction method (with some differences) for a quantitative analysis: Calculation of mass absorption coefficients is based on Cha
Publikováno v:
Inorganic Materials. 56:1409-1422
This work is aimed at development of a method of investigation into the chemical composition of natural and synthetic nitrogen-containing compounds using electron probe microanalysis (EPMA) and its application for identification of the form of inclus
Publikováno v:
Journal of Analytical Chemistry. 75:902-908
To increase the accuracy of electron probe microanalysis, it was proposed to calculate absorption coefficients range-by-range, with selecting an optimum calculation method for each absorption range. The approach was implemented in the analysis of roc
Autor:
L. V. Usova, Yu. G. Lavrent'ev
Publikováno v:
Russian Geology and Geophysics. 59:1461-1468
X-ray electron probe microanalysis is a complete mineral analysis technique. Therefore, the sum of obtained concentrations can be used as an indicator of the quality of analysis. There are two kinds of errors of the sum of concentrations. The first i
Autor:
Yu. G. Lavrent'ev, L. V. Usova
Publikováno v:
Journal of Analytical Chemistry. 73:42-49
Four methods of correction and three methods of calculation of absorption coefficients are tested in electron probe microanalysis of rock-forming minerals. Experimental data by Pouchou and Pichoir, Sewell–Love–Scott, and Armstrong are attracted i
Autor:
L. V. Usova, Yu. G. Lavrent’ev
Publikováno v:
Аналитика и контроль. 20:15-22
Publikováno v:
Russian Geology and Geophysics. 56:1428-1436
The protocol for analysis of rock-forming mineral compositions by X-ray electron probe microanalysis used at the Institute of Geology and Mineralogy, Novosibirsk, Russia, is described. The analysis is conducted with a JXA-8100 electron probe microana
Publikováno v:
Russian Geology and Geophysics. 56:1154-1161
The results of electron probe microanalysis of several rock-forming minerals by wavelength-dispersive spectrometry (WDS) and energy-dispersive spectrometry (EDS) are compared, and the metrological characteristics of both methods are studied. The meas
Autor:
Yu. G. Lavrent’ev
Publikováno v:
Аналитика и контроль. 17:252-274
Publikováno v:
X-Ray Spectrometry. 41:338-341
Relative intensities of X-ray lines for various reflection orders are measured using a JXA-8100 microprobe analyzer. Spectra obtained using standard analyzing crystals LiF, PET, TAP, LDE1, and LDE2 are studied. We observe and explain specific feature