Dear All,
I used (50% Lithium Tetraborate , 50% Lithium Metaborate FLUX and 20% Ammonium Iodide for fusion of PHOSPHATE and CALCIUM samples and FUSION furnaces, Drying oven is fully calibrated, the problem was all XRF analysis results gives High Calcium Concentration (%)
Dear Adel A. Almalki ,
what elements do you expect to see via XRF?
To my opinion you can see P, Ca and I; all other elements involved in your chemical reaction ( Li, B, N and O) have got too low atomic numbers; their fluorescence radiation is too low in photon energy. These photons will be absorbed by the sample itself, the surrounding air and the detector window.
You may share an XRD spectrum...
There are two basic EDS methods, electron-based EDS (usually electron microscopes-based) and X-ray based EDS (XRF). Electron based EDS is most sensitive to the lighter elements, while XRF is most sensitive to heavier elements. Both methods can detect all elements if they are in high enough concentrations. The neutral point is usually some where around P to Cl, depending upon the total electron voltage of your probes. Both methods can be quantitatively capable if well calibrated with an appropriate standard Containing all involved elements in detectable amounts. You can create your own standard as long as each involved element is present in detectable amounts. At least 6 independent calibration analyses are needed of your standard for the calibration, and all 6 of these analyses need to be averaged together and then entered into the system to be used as your standard. I would recommend at least 6 analyses of your experimental material as well.
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