X-ray Analysis

As a fast, quasi-nondestructive analytical technique, X-ray fluorescence (XRF) spectroscopy is useful for a wide range of applications. To get a sense of the current breadth of XRF’s use and its potential growth in new areas, we asked a panel of experts to comment on the most important application areas for XRF, including the challenges involved and how XRF competes with other techniques.

Zinc telluride films doped with gadolinium (ZnTe:Gd)-made by laser ablation and deposition-have been characterized by X-ray photoelectron spectroscopy (XPS) to determine the molecular species of the elements in the material and their presence as intentionally formed contaminants.

In honor of Spectroscopy's celebration of 30 years covering the latest developments in materials analysis, we asked a panel of experts to assess the current state of the art of X-ray fluorescence and to try to predict how the technology will develop in the future.

Works of art often consist of multiple layers and can require several complementary techniques for complete analysis, and invasive sample preparation procedures and analysis techniques are not good choices. This interview with Dr. Karen Trentelman of the Getty Conservation Institute (GCI) in Los Angeles, California, discusses her research with X-ray fluorescence (XRF) spectroscopy for the study of cultural heritage materials such as paintings, sculptures, and illuminated manuscripts.

Determination of trace metals in oil and petroleum typically is based on ICP-OES methods, requiring signficant sample preparation and expensive instrumentation. This article presents an alternative method, based on the use of a handheld energy-dispersive X-ray fluorescence analyzer, that involves minimal sample preparation, uses authentic standards for calibration, gives low parts-per-million detection limits, and provides significant time and cost savings.

A look at ICP–MS, ICP–OES, X-ray fluorescence spectroscopy, and laser-induced breakdown spectroscopy in the areas of research and development, marketing, application, and use of these techniques.

Here, Li2CaSiO4:Sm3+ reddish orange phosphors were synthesized by a solid-state reaction method and examined by spectroscopic methods.

Everyone loves a list, and the editors of Spectroscopy are no exception! In 2013, Spectroscopy covered a wide array of topics throughout the year to bring you the most relevant information for your work, on topics ranging from selecting the right ICP-MS system to deciding which Raman technique is right for you, from our annual salary survey to calibration transfer. Here is a list of 13 popular articles and columns from 2013

Click here to view the complete Wavelength newsletter from November 12, 2013.

The main areas of training necessary for a good foundation in the analytical methodology of XRF spectroscopy are discussed.

Researchers continue to find new uses for portable X-ray fluorescence and portable Raman techniques in the field. Mary Kate Donais, an associate professor in the Department of Chemistry at Saint Anselm College, recently spoke to us about her experiences with these techniques at an archaeological excavation site in Italy.

X-ray photoelectron spectroscopy (XPS) can be used to determine the contaminants present on laboratory gloves and to evaluate the type and amount of contamination transfer from gloves to other surfaces.

Raman has a unique capability to characterize nanoscale materials that are between crystalline and amorphous.

This November, NASA's Mars Science Laboratory will be launched on a mission to Mars that will deploy a new rover, called "Curiosity." Curiosity will include several analytical instruments, including "CheMin," which uses X-ray diffraction (XRD) and also has limited X-ray fluorescence (XRF) capabilities.

Koen Janssens, professor of chemistry at the University of Antwerp (Belgium), uses synchrotron radiation-based X-ray fluorescence (XRF) to analyze historic works of art. In a recent study, he used various spectroscopic techniques, including several X-ray methods, to reveal the process by which the yellow paint in some of Vincent Van Gogh?s paintings darkened over time.

Here's a preview what you'll hear at the Denver X-ray Conference.

From the field to the synchrotron, XRF is expanding its power and scope.

X-ray fluorescence spectroscopy (XRF) provides sensitive analysis of the atomic composition of samples. The technique is particularly well-suited for analyzing the elemental range from sodium to uranium, which covers the majority of the metallic elements.

Building on more than 10 years of Micro-XRF experience, the Orbis spectrometer yields a system with excellent Micro-XRF capability while setting a new standard in analytical flexibility.

The measurement of the elemental composition of suspended particulate matter (SPM) in air is a key factor in understanding the health effects of pollution.

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.

Volker Thomsen takes a look at the impact that the discovery of X-rays by Wilhelm Röntgen in 1895 has had on the world.

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).

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.

The authors present an overview of the chemical analysis process.