Инд. авторы:	Korolyuk V.N., Pokhilenko L.N.
Заглавие:	Electron probe determination of trace elements in olivine
Библ. ссылка:	Korolyuk V.N., Pokhilenko L.N. Electron probe determination of trace elements in olivine // X-ray Spectrometry. - 2014. - Vol.43. - Iss. 6. - P.353-358. - ISSN 0049-8246. - EISSN 1097-4539.
Внешние системы:	DOI: 10.1002/xrs.2562; SCOPUS: 2-s2.0-84918547153; WoS: 000344178700008;
Реферат:	eng: Evaluation of the error of computations using analysis results requires knowing the error of determining the analyte. The necessity of limiting the error of computations conditions the value of the permissible error of determining the concentration: it should not exceed a certain predetermined limit. In particular, such a requirement is made for determining a component by the content of which the temperature of rock formation is calculated in a mineral. This study demonstrates derivation of a formula for quantitation limit Clim of an analyte. Relations have been obtained connecting Clim, the detection limit Cmin, and the relative standard deviation V of the element quantitation. The equations connecting metrological characteristics allowed identifying the required analysis conditions and their practicability. The characteristics of the methodology for quantitation of Na2O, Al2O3, CaO, Cr2O3 i{cyrillic} MnO in the olivines of depleted peridotites have been identified using microanalyzer JXA-8100, with the accelerating voltage of 20kV and the probe current of 400nA. The count rate per measurement was 10s in the line and background positions. The number of measurements per quantitation was 25. Under these conditions, Cmin of the aforementioned oxides does not exceed 9ppmw for 1σ-criterion. For V=0.1, Clim is within the range of 45-100ppmw. The example of an 'aluminum' geothermometer serves to demonstrate that electron probe micro analysis may ensure the error required for calculating the temperature by the content of trace elements. © 2014 John Wiley & Sons, Ltd.
Ключевые слова:	MELTS; LIMITS; PERIDOTITE;
Издано:	2014
Физ. характеристика:	с.353-358