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March 2012 |
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Analysis of Iodine Value in Pork Fat Using FT-NIR Hui Li, Robert Cocciarrdi, and John Richmond, Bruker Optics, Inc. Pork fat was directly analyzed in this study with Bruker’s FT-NIR system for iodine value (IV) with an accuracy expressed in RMSEP of 1.1 IV. |
| Raman Spectroscopy for Identification and Characterization of Polymers B&W Tek, Inc. Raman spectroscopy is a rapid, nondestructive tool for determining the composition of polymer matrices and additives. This article discusses measuring unique and subtle differences in the matrices for quantitative analysis. |
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| UV-vis Measurement of High Absorption Samples Shimadzu Traditionally, samples that cannot be thinly sliced, diluted, or subjected to other pretreatment procedures are difficult to measure. This note presents application examples utilizing a new UV-vis spectrophotometer that features a wide photometric range, making measurement of these samples easy. |
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| Observing the Solar Spectrum at House of Science K.E. Johansson1, C. Kozma2, and Ch. Nilsson2,1Stockholm House of Science and Department of Physics, Stockholm University and 2Department of Astronomy, Stockholm University Analysis of the temperature of the photosphere and determine the temperature by students using CCD spectrometers. |
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| Confocal Raman for Depth Profiling of Polymer Films Fran Adar, Horiba Scientific A confocal Raman microscope can be used to depth profile (up to 100 µm below the surface) of a multilayered polymer film. |
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| Long-Wavelength Dispersive 1064 nm Raman Counterfeit Detection of Rum, Shampoo, et al. Claire Dentinger, Eric Bergles, Lin Chandler, and William Yang, BaySpec, Inc. Increased capability for identifying genuine versus counterfeit materials is achieved by using dispersive 1064 nm Raman analyzers. |
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| Determination of Low Concentration Methanol in Alcohol by an Affordable High Sensitivity Raman Instrument Duyen Nguyen and Eric Wu, Enwave Optronics, Inc. Low concentration natural methanol exists in most alcoholic beverages and usually causes no immediate health threat. Nevertheless, it is possible to have natural occurring methanol in beverages with concentration as high as 18 g/L of ethanol. |
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| Sampling of Eye Drops Using Multi Reflection ATR S.L. Berets1, M. Nassar1, and M. Milosevic2, 1Harrick Scientific Products, Inc. and 2MEV Photonics Multiple reflection ATR is ideal for detecting miniscule components in solution. A multiple reflection ATR, with a small, short path diamond, can readily distinguish between aqueous liquids by examining low concentration functional groups, as shown herein. |
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| Strategies to Compare Far-UV Circular Dichroism Spectra of Similar Proteins Using Chirascan™-plus ACD Dr. Lindsay Cole, Applied Photophysics Ltd. Two approaches to comparing the circular dichroism spectra of protein samples without knowledge of the exact protein concentration were examined. |
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Silicone Coating on Paper and Plastic by EDXRF Scott Fess, Applied Rigaku Technologies, Inc. Simple to operate, the NEX QC gives the QC technician an ideal tool for quickly checking silicone coat weight in order to maintain the highest product quality with minimal costs. |
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Corrosion Resistance of DuraBeryllium® Plus X-ray Windows Roger Ketcheson, Moxtek DuraBeryllium® Plus windows are Moxtek’s most robust coated beryllium X-ray window. This window has an additional thin coating of polymer “Plus” applied to the already robust DuraBeryllium window. The Plus layer is more resistant to water and other harsh chemicals. |