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In our July issue:
COLUMNS
Atomic Perspectives
Handheld X-ray Diffraction for Remote, Field-Based Applications
Graeme Hansford and Robert Thomas
Two novel X-ray diffraction (XRD) techniques–back-reflection energy-dispersive XRD and mineral- or phase-specific XRD–enable the rapid analysis of unprepared samples using handheld instrumentation for remote applications.
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Spectroscopy Spotlight
Mars 2020: Seeking Evidence of Life with Micro-XRF
The new rover for NASA's Mars 2020 mission will include a micro-X-ray fluorescence instrument called “PIXL.” Abigail Allwood, the principal investigator for PIXL at NASA's Jet Propulsion Laboratory, talked to us about the development of the instrument and how it will be used.
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IR Spectral Interpretation Workshop
More Theory and Practice: The Thorny Problem of Mixtures and More on Straight-Chain Alkanes
Brian C. Smith
Five tried-and-true techniques for dealing with the IR spectral interpretation of mixtures. And check out the results of the recent quiz – and take the new one!
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Chemometrics in Spectroscopy
Optimizing the Regression Model: The Challenge of Intercept-Bias and Slope “Correction”
Jerome Workman, Jr., and Howard Mark
Why does this problem continue to plague researchers and users of chemometrics and spectroscopy?
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Spectroscopy Spotlight
Advancing Trace-Element Speciation in the Environment, Food, and Biota
Jörg Feldmann has been advancing speciation methods for more than 20 years. He is now using these methods to address questions such as which rice cultivars best resist arsenic uptake into the rice grain and how metalloproteins and metallolipids are transported in fish.
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New White Paper
Echelle vs ORCA –– Which ICP-OES optical technology offers superior performance?
This paper explains fundamental differences between two leading optical designs as used in high performance spectrometers. The paper explains how each technology deals with technical challenges such as light loss, stray light, spectral order overlaps, and others. Application examples and analytical results are included.
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PEER-REVIEWED ARTICLE
Application of SERS to the Determination of Butylated Hydroxyanisole in Edible and Essential Oils
Magdalena Wrona, Jesús Salafranca, Massimiliano Rocchia, and Cristina Nerîn
A new method was developed for BHA determination in edible and essential oils by SERS Raman microscopy, without the need for any sample handling or pretreatment.
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If you would like to submit an article to Spectroscopy, contact Laura Bush, Editorial Director - [email protected]
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