X-ray Analysis

Here, we compare XRD and FT-IR for analysis of suspect counterfeit pharmaceuticals to determine how the techniques can be used in a complementary fashion.

Portable spectroscopic instruments have not had significant visibility within the scientific community compared with, for instance, the current generation of high-performance laboratory mass spectrometers.

Forensic traces are physical remnants of past events that provide critical information for criminal and civil investigations and adjudications. The scientific examination of traces is an incredibly valuable tool for forensic investigations, because the skilled interpretation of traces yields factual answers to a range of pertinent questions.

The increasing demand for secondary electrochemical storage devices requires well characterized and working battery systems.

Click the title above to open the Spectroscopy November 2019 Supplement, X-Ray Spectroscopy Methods & Applications in an interactive PDF format.

EDXRF offers potential advantages over ICP-OES for elemental analysis in agriculture. Karen Daly and Anna Fenelon of the Agriculture and Food Development Authority of Ireland spoke to us about their work investigating agricultural applications of this technique.

The accumulation of heavy and toxic elements in gallstones and kidney stones can be studied using WDXRF spectroscopy. Here, Vivek K. Singh of Shri Mata Vaishno Devi University in India talks about his work using this technique to understand the formation and content of these stones in the body.

Total-reflection X-Ray fluorescence analysis (TXRF) and grazing-incidence XRF (GIXRF) may be applied for surface and bulk trace element analysis of thin-layered systems. Burkhard Beckhoff of the Physikalisch-Technische Bundesanstalt (PTB) in Germany spoke to us about his recent work in this field.

Our annual review of products introduced at Pittcon or during the previous year

Serial femtosecond crystallography is a promising new technique for protein structure determination, where a liquid stream containing protein crystals is intersected with a high-intensity X-ray free electron laser beam that is 109 times brighter than traditional synchrotron X-ray sources. We were recently able to interview Prof. Alexandra Ros, a FACSS Innovation Award winner from the 2018 SciX conference regarding her research work on this subject.

To test the accuracy of residual stress measurements made with portable X-ray devices, measured normal and shear stresses were compared with the applied (true) values for accuracy assessment. From those results, practical measurement and analysis protocols for precise and accurate stress measurements are proposed.

There has been a resurgence in the application of small-angle X-ray scattering for a large range of problems in materials science. This article highlights experimental requirements and applications, with examples drawn from protein solutions, porous structures, and polymers.

The EDXRF method described here is a quick and economical procedure to check samples for their oxygen content to ensure that the material used for diesel fuel blending is really FAME-based and not mineral-oil based.

An evaluation of the ability of XRF spectrometry to perform elemental impurity analysis of 12 elements in various pharmaceutical materials

Several leading scientists discuss their work to advance XRF and XRD techniques.

These tables are supplementary to the “Atomic Perspectives” column installment “Using XRF as an Alternative Technique to Plasma Spectrochemistry for the New USP and ICH Directives on Elemental Impurities in Pharmaceutical Materials,” which was published in the July 2017 issue of Spectroscopy (1).

Miniaturization of analytical instruments of various forms of spectroscopy has improved dramatically in recent years mainly because of the requirements in certain areas such as space, industrial, and environmental research. Research into miniaturization is primarily driven by the need to reduce the instrumental space and costs by reducing the consumption of expensive reagents and by increasing throughput and automation. Like other fields, analytical systems have also been affected by novel ideas and unprecedented advances in the microelectronics leading to miniaturization of different components in recent years. This article presents an overview of the current developments in the miniaturization of analytical instruments for mainly detecting metals at extremely low concentration levels, with some important examples from areas such as space, mineral exploration, the environment, and pharmaceuticals, focusing primarily on advancements as well as the challenges that have impacted from some of the major international manufacturers.

Several leading scientists discuss recent developments and trends in XRF and XRD techniques.

Total reflection x-ray fluorescence (TXRF) spectrometry is an energy-dispersive x-ray technique that is used for elemental and chemical analysis, and is especially suitable for small-sample analyses. Ursula Fittschen, an assistant professor at Washington State University, is working on elemental microscopy and micro analysis. She has been using TXRF to analyze stainless steel metal release, and also airborne silver nanoparticles (NPs) from fabrics. Here, she describes the advantages and challenges of this technique.

Our annual review of products introduced at Pittcon or during the previous year, broken down by the following categories: accessories, atomic spectroscopy, components, imaging, mass spectrometry, mid-IR, NIR, NMR, Raman, software, UV-vis, and X-ray.

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.