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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

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

Thermogravimetric analysis (TGA) is a vital technique for analyzing the thermal stability and composition of materials by measuring the mass change as a function of temperature. In the context of alumina (Al₂O₃), TGA helps identify thermal events such as dehydration, dehydroxylation, and decomposition of impurities. This article provides a detailed procedure for using a thermogravimetric analyzer to measure the loss on mass in alumina, incorporating specific considerations for accurate and reliable results.

Materials and Equipment

• Thermogravimetric Analyzer (TGA)
• Alumina Sample
• Crucible (typically made of platinum or alumina)
• Balance for initial weighing
• ...