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Reducing the Particle Size Effect in XRF Measurements
Undertaking X-ray fluorescence (XRF) is an excellent way of ascertaining a material’s elemental make-up. Not only is XRF a non-destructive technique, meaning that the analyzed sample remains undamaged, but it can identify a variety of elements, starting with sodium (Na) and ending with uranium (U). Its ability to decipher the elements within a sample works through the application of X-rays. These X-rays can excite a material’s atoms, generating characteristic X-rays that have a specific energy that relates to an element, which can be deciphered through a detector. Unfortunately, there is something that can affect the accuracy of XRF measurements: the particle size effect.
The Particle Size Effect And Its Consequences
There are time
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Minimizing Matrix Effects in XRF Spectrometry
X-ray fluorescence (XRF) spectrometry is a mainstay in chemical analysis. It provides non-destructive elemental detection of major and trace elements—ranging from 100% to the sub-PPM range. This applies to a huge range of elements, typically from beryllium (Be) up to uranium (U). But it’s not without limitations. Matrix effects, for instance, pose a serious obstacle to accuracy. Elemental variations within the sample trigger these effects. They can disrupt X-ray absorption and fluorescence emission, which impairs results.
Fortunately, there are tried-and-trusted solutions to overcoming matrix effects.
1. Prioritize Proper Sample Preparation
The foundation of accurate XRF analysis begins with meticulous sample preparation. A homogenous and repre
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Using a TGA Machine to Measure LOI in Cement
Loss on Ignition (LOI) is a critical parameter in assessing the quality and composition of cement. It measures the percentage of volatile substances – including moisture, carbon dioxide, and organic compounds – released when the cement is heated to a high temperature. This blog will detail the step-by-step procedure to measure LOI using a thermogravimetric analyzer (TGA), ensuring accurate and reliable results in compliance with ASTM C150 standards.
Obtaining a LOI Measurement From a Thermogravimetric Analyzer
1. Weighing the Empty Crucible
The first step in ascertaining an LOI measurement with a thermogravimetric analyzer is to weigh an empty crucible and record its mass. This initial mass is essential for accurately determining the
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