X-ray Analysis

Feb 01, 2010
Application Notebook
By Spectroscopy Editors
One of the most common product safety-related analytical tests in the pharmaceutical industry (often referred to as a Limit Test) is the quantification of heavy metals or inorganics in all materials within a pharmaceutical product.
Jul 14, 2009
Spectroscopy
By Spectroscopy Editors
Volker Thomsen takes a look at the impact that the discovery of X-rays by Wilhelm Röntgen in 1895 has had on the world.
Jul 01, 2009
Spectroscopy
By Spectroscopy Editors
X-ray diffractometry (XRD) is an X-ray–based method for determining the crystal structure of a material. Because X-ray wavelengths are of roughly the same size as the interatomic spacings of a crystal, significant diffraction of the waves occurs.
Jul 01, 2009
Spectroscopy
By Spectroscopy Editors
The author discusses the improvements offered by silicon drift detector energy dispersive X-ray spectrometry (SDD-EDS) systems over the classic Si(Li)-EDS for mapping the compositional microstructure of matter with scanning electron microscopy (SEM).
Oct 01, 2008
Spectroscopy
The authors present an overview of the chemical analysis process.
Jul 01, 2008
Spectroscopy
By Spectroscopy Editors
X-ray fluorescence spectroscopy (XRF) is one of the primary analytical tools used in the cement industry for a variety of related applications. The principle of XRF is relatively simple; a source directs X-rays onto the atoms of the sample, ejecting electrons from the inner electron shells.
Mar 01, 2008
Application Notebook
By Spectroscopy Editors
Jul 01, 2007
Spectroscopy
By Spectroscopy Editors
The twentieth century saw the rise of several novel instrumental techniques based on the use of X-rays. Today, X-ray spectroscopy and diffractometry continue to prove their utility as advances in instrumentation produce new methods and enable new applications.
May 01, 2007
Spectroscopy
By Spectroscopy Editors
The "fundamental parameters" approach to calibration in X-ray fluorescence is unique because it is based upon the theoretical relationship between measured X-ray intensities and the concentrations of elements in the sample. This theoretical relationship is based upon X-ray physics and the measured values of fundamental atomic parameters in the X-ray region of the electromagnetic spectrum. In this tutorial, an introduction to the means of calibration is provided based upon a simplified instrument–sample geometry, thus eliminating some of the mathematical details of the traditional derivations.
Sep 01, 2006
Spectroscopy
September 2006. The authors discuss the benefits of X-ray fluorescence (XRF) for the determination of elemental nutrients in foodstuffs and X-ray diffraction (XRD) for the measurement and characterization of different compounds used in the pharmaceuticals industry.
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