April 2012 Subscribe Go to Application Notebook

Featured Application Note: IC-ICP-MS Speciation Analysis of As in Apple Juice Daniel Kutscher, Shona McSheehy, Julian Wills, and Detlef Jensen, Thermo Fisher Scientific In this study, apple juice samples are analyzed by IC-ICP-MS to determine the concentration of six arsenic species: the two inorganic, and highly toxic, species (As [V] and As [III]) and four organic species (arsenobetaine [AsB], arsenocholine [AsC], monomethylarsonic acid [MMA], and dimethylarsinic acid [DMA]). Measurement of Sodium and Potassium in Portland Cement by Flame AA Shimadzu Scientific Instrument Low-alkali types of Portland cement contain concentrations of Na and K that are suppressed to low levels. Presented here is an analysis of Na and K in a standard sample of Portland cement (211R) to determine their respective concentrations.   Fingerprinting of Raw Materials Used in Glass Production PANalytical This note demonstrates that PANalytical’s Epsilon3 XRF can rapidly identify raw materials for glass production, subtle differences in processing (glass sand versus flour), or easily differentiate slight chemical composition variations.

Learn About AffirmoEX™ — New Electron Magnetic Resonance System Christopher White, Colin Elliott, and James White, Oxford Instruments Magnetic Resonance Recent years have seen a dramatic upsurge in the availability of miniaturized sensing technologies. Rapid advances in technology have been applied to scientific instruments, enabling new rugged, highly miniaturized spectrometers.   3D Confocal Raman Imaging in Semiconductor Research Thomas Dieing, Marius Henrich, and Eberhard Richter, WITec GmbH The exacting standards of quality and reliability of structured substrates in the semiconductor industry require in-depth knowledge concerning the interior structure of the devices. In this application note, we present results of 3D confocal Raman imaging measurements for such characterizations.   Thermally Stabilizing Your Miniature Spectrometer Yvette Mattley, PhD, Ocean Optics The use of an active heating device to ensure spectrometer thermal wavelength stability — observed as how well the spectrometer performs without variation — is addressed in this application note.   Advantages of TE Cooling for Raman and Fluorescence B&W Tek, Inc. In this application note we demonstrate the benefits of a TE cooled spectrometer by comparing the technology with a noncooled device, configured for both fluorescence and Raman spectroscopy.

The Determination of Hg in Food/Fish Samples By Direct Analysis Arshad Kokardekar, Milestone Inc. Direct mercury analysis, as described in EPA 7473, is an alternative method to traditional techniques that require elaborate prep procedures. Direct mercury analysis requires no sample prep and delivers results in as little as ~6 min per sample making it significantly faster with comparable or better recoveries than traditional wet chemistries.