Rigaku Publishes Method for EDXRF Analysis of Dolomite

Rigaku Application Note #1626 describes a method employing energy dispersive X-ray fluorescence (EDXRF) for the measurement of calcium carbonate (CaCO₃), magnesium carbonate (MgCO₃), ferric oxide (Fe₂O₃), aluminum oxide (Al₂O₃), silicon dioxide (SiO₂) and potassium oxide (K₂O) in dolomite using empirical calibration. The report includes detailed information describing sample preparation, calibration and repeatability, and highlights the performance of the Rigaku NEX QC+ high-resolution benchtop EDXRF spectrometer.

Dolomite is typically used as an aggregate in concrete and asphalt for building roads. During mining and processing operations, dolomite composition must be monitored and controlled to ensure proper quality and desired characteristics for various applications.

For the analysis described in the report, the sample is ground into a homogeneous powder approximately 100-200 mesh and prepared as a hydraulically pressed pellet.

Measurement was performed using the NEX QC+ EDXRF spectrometer, a self-contained analyzer with simple touch screen operation; it is suited for at-line control and quality checks throughout the mining and processing of dolomite. As a high-performance, low cost benchtop EDXRF system, the NEX QC+ analyzer is designed to provide an optimal means for measuring major carbonate and oxide components in dolomite, with simple and intuitive software designed for the non-technical at-line operator or for use in quality control labs.

The performance shown in the report demonstrates that the NEX QC+ system provides excellent sensitivity and performance for the measurement of carbonates and major oxides in dolomite. Self-contained with simple touch screen operation, NEX QC+ is an ideal tool for at-line control and quality checks throughout the mining and processing of dolomite.

A copy of this report may be requested here.