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Silicate rock analysis by fusion method

AppNote XRF1068: silicate rock analysis by fusion method

Background

Geochemical data set for silicate rocks are essential for modern petrology. Concentrations of major and trace components in igneous rock sample provide many kinds of information about rock history such as eruption or solidification, magma evolution, magma genesis and source materials as well as petrographical classification. X-ray fluorescence spectrometry for silicate rock analysis has been developed for the last few decades. XRF technique is currently used as standard analytical method to determine the chemical composition of major elements in silicate rocks. Rock analysis which demands high accuracy requires the fusion method to eliminate sample heterogeneity, such as grain size and mineralogical effect, owing to various rock-forming minerals. Conventional fusion method has been dominantly used for determination of major elements in silicate rock because dilution by flux significantly reduces sensitivities of trace elements. Pressed powder method is, therefore, applied to trace element analysis. Since it is not efficient and time-consuming that one sample analysis requires two preparation methods, the low dilution fusion method was developed. The low dilution fusion bead technique is a method to improve sensitivity of trace elements, which enables to determine the concentrations of trace elements accurately and reliably as well as major element determination by XRF. This note demonstrates advanced methods to determine the chemical composition in silicate rocks by XRF.

WDXRF products from Rigaku

Sequentielles WDRFA Spektrometer zur Analyse der Elemente von O bis U in Feststoffen, Flüssigkeiten und Pulvern

Benchtop tube below sequential WDXRF spectrometer analyzes O through U in solids, liquids and powders

Sequenzielles WDRFA-Spektrometer mit hoher Leistung, Röhre oberhalb der Probe, mit ZSX Guidance Systemsoftware

High power, tube above, sequential WDXRF spectrometer with new ZSX Guidance expert system software

High-power, tube-below, sequential WDXRF spectrometer with new ZSX Guidance expert system software

High power, tube below, sequential WDXRF spectrometer with Smart Sample Loading System (SSLS)

High power, tube below, sequential WDXRF spectrometer with Smart Sample Loading System (SSLS)

High power, tube above, sequential WDXRF spectrometer

High power, tube above, sequential WDXRF spectrometer

WDXRF spectrometer designed to handle very large and/or heavy samples

WDXRF spectrometer designed to handle very large and/or heavy samples

High-throughput tube below multi-channel simultaneous WDXRF spectrometer analyzes Be through U

High-throughput tube-above multi-channel simultaneous WDXRF spectrometer analyzes Be through U

WDRFA Spektrometer für niedrige Schwefelgehalte nach ASTM D2622 und ISO 20884

WDXRF ultra low sulfur analyzer for method ASTM D2622

ASTM D2622 method WDXRF analyzer for sulfur (S) in petroleum fuels and ULSD