How can we quantitatively analyze the values of phases in a material by conventional instrumental analysis methods?
There are ore samples with a large number of different phases of minerals (chalcopyrite (between 0.1 and 0.7 %), pyrite (between 1 and 10 %), types of aluminosilicates, etc.). Samples have been taken from various parts of the mine and we are going to quantitatively identify the phase map of chalcopyrite in these parts.
Phase analysis in the values below approximately 5% using XRD is not quantitatively accurate. QEMSCAN analyses are costly.
Our target phases (here are chalcopyrite) are below 2%.
So Thanks Dear Baraa Hafez It should be noted that the conventional XRDs are a semi-quantitative analysis method and are not suitable for the quantitative (accurate) determination of phase distribution, especially with lower percentages (
Many of the methods can be used for both qualitative and quantitative analysis. The major categories of instrumental methods are the spectral, electroanalytical, and separatory.
so it depends on your samples types
Please let me be specific. The sample is mining ore (with a wide variety of phases and minerals: quartz SiO2 (to 80% wt/wt), chalcopyrite (CuFeS2 (to 3% wt/wt), Pyrite (FeS2 (to 10% wt/wt)) and Hematite and magnetite in minors.
Our goal is to investigate chalcopyrite CuFeS2. We know that this mineral can have wide variations in the mining environment from 1% to 3% (very minors to quantitatively detect using normal XRD analysis).
Although instrumental methods such as QEMScan can quantitatively cover these changes with very good accuracy and obtain a complete map of the specific phase of the chalcopyrite CuFeS2, the question is that is it possible to map the phase CuFeS2 distribution of a compound in the ore rock by conventional laboratory methods such as semi-quantitative XRD, EDS, ICP, chemical analysis?
Actually, To lower the costs…..
It is likely to have come to such a conclusion by calibrating. Like what we get in quantitative analysis of organic compounds in minors with the UV-Vis analysis with calibration. We have a color combination of that organic matter with fully specified percentages beforehand (e.g. 5 samples). The peak intensity obtained at a specific wavelength characterizes that material. Then, we use this calibration curve to detect the unknown organic in minors from new samples.
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