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March 2012 Edition - Celebrations of Chemistry

  • Food Science - TXRF Spectrometry for the Rapid Screening of Nutrition-Relevant Elements in Fish and Vertebrates
    TXRF spectrometry was used to check the analytical performance on a fish-protein certified reference standard. An additional feasibility study was then performed on a variety of fish and meat from a local grocery store. It was demonstrated that rapid screening of trace elements and heavy metals in muscle tissue samples is practical with TXRF.
  • Mineralogy - Use of XRD in the Iron Ore Business
    X-ray diffraction, or XRD, is the only analytical method that directly measures the mineralogy of ore. Ore is considered a rock mass from which one or more minerals or metals can be recovered at a profit. This article outlines the use of XRD for the qualitative and quantitative mineralogy of iron (Fe) ores. Dig in to learn about the many capabilities of XRD to this vital industry, including advantages over competitive methods.
  • Clinical Chemistry - Trace Elemental Analysis of Mother's Milk, Seminal Fluid, and Blood Serum
    Trace amounts of metals are increasingly used as dietary supplements in the prevention of diseases and as adjuvant therapeutics. These trace metals confer unique reactivities to their respective enzymes. This article examines the use of TXRF for the presence and concentrations of trace elements in three biological fluids: mother's milk, seminal fluid, and blood serum.
  • Metallurgy - Retained Austenite Evaluation Using a Two-Dimensional Detector (XRD2)
    Austenite is an interstitial solid solution of carbon in gamma-iron normally observed at temperatures above 723°C. The amount of austenite retained during steelmaking has significant effects on the steel's mechanical properties. Read on to discover how a D8 DISCOVER with a VÅNTEC-500 2D detector and quantitative Rietveld analysis enables routine phase mapping of retained austenite in any metallurgical lab.