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The Art of Milling
Dr. Andreas Theisen, Retsch
The following situation is typical for many production plants: After a routine quality check, the production process is stopped or an already produced batch is suspended because the analysis results were not within the relevant critical values. But does the tested product really deviate from the specifications? The quality control managers are convinced of this because modern analysis instruments provide results with very low tolerances. The sample in question was tested several times and the result was confirmed. The question is why the product does not match the specifications although the production parameters have not been changed in any way.
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Analysis of Trace Elements, Including Sulfur, in Copper Using a DC Arc
Maura Rury, Teledyne Leeman Labs
The analysis of trace elements in high purity copper is challenging using techniques that require sample digestion prior to analysis. Digestion procedures are often complex, time-consuming, and increase the risk of sample contamination during preparation. DC Arc allows copper samples to be analyzed in their solid metallic form, eliminating the need for sample dissolution and greatly increasing the speed with which samples are prepared and analyzed.
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A Comparative Study of Groundwater, ERM®- CA615, EPA Method 245.7 and ISO Method 17852, Using the CETAC QuickTrace™ M-8000 CVAFS
Jeff Forsberg, Brian Cook, and Sarah Prince, CETAC Technologies
Groundwater analysis is a crucial part of environmental monitoring. Groundwater is one of the most vital natural resources. It is an essential source of drinking water, therefore its safety is critical. However, it can present many obstacles for the analyst. It is a powerful tool used to gather information regarding the ecosystem. Contamination, interferences, and sample preparation are a few of the major obstacles that can arise when monitoring mercury at this level. Mercury is prevalent through point source contamination that often comes from industry and bio-accumulation.
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Direct Analysis of Milk Using the Agilent 4100 Microwave Plasma-Atomic Emission Spectrometer (MP-AES)
Daniela Schiavo, George L. Donati, Renata S. Amais, Leonel S. Teixeira, Leticia M. Costa, and Joaquim A. Nobrega, Agilent Technologies
A new method for Al, Cr, Cu, Fe, Mg, Mn, and Zn determination in a non-fat, liquid milk sample and in a standard reference material of non-fat, milk powder. In addition to the lower operational and maintenance costs of MP-AES, the detection limits achieved by the new method are comparable to ICP-OES and significantly superior to FAAS.
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UV-vis-NIR-SWIR Spectrophotometer Analyzer Comparison
Moxtek
The Moxtek Proflux® UVD260 and UVD240 analyzers provide superior broadband performance in spectroscopy applications ranging from 240 nm in the Deep UV up to 3.3 µm in the mid-wavelength infrared. The Moxtek Proflux® designs utilize wafer-scale aluminum nanowire® fabrication technology to produce the finest-pitch commercial wire grid polarizers on the market. These deeply sub-wavelength optics offer the benefits of conserved space, an exceptionally wide field acceptance angle, minimal performance variation with wavelength, and none of the dramatic short-wavelength infrared disturbances present in Glan-Taylor and Glan-Thompson polarizers.
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Rapid Screening in Microbiology by FT-IR
Jenni L. Briggs, PhD, PIKE Technologies, Inc.
An in-compartment XY plate-reader is introduced as a biological sampling tool for laboratories confronted with high-throughput demands and the need to save resources through automation.
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Analysis of Contaminations on Plastic Using FT-IR
Thomas J. Tague Jr., PhD, Bruker Optics
Contaminations of polymer products are often microscopically small and not east to analyze. Without knowing the chemical composition of the defect, the determination of its origin is often difficult. FT-IR microscopy is an attractive tool for the analysis of contaminations, since this technique is capable of identifying not only organic but also inorganic components.
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1064 nm Dispersive Raman for Ink and Paint Classification
Huawen (Owen) Wu, Jack Qian, and Lin Chandler, Bayspec
Forensic examination often demands versatile analytical techniques with high specificity, high accuracy, and direct measurement ideally with little sample preparation, non-destructive and non-contact. Raman proves to be by far the most suitable analytical tool that can satisfy these essential criteria. Coupled with a microscope, it is capable of identifying trace forensic evidence in micro-scale with direct chemical specificity.
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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 grams per liter of ethanol; or equivalent to 0.72% methanol in 40% ethanol, in alcohol (1). Current EU regulation limits naturally occurring methanol to below 10 grams per liter of ethanol; or equivalent to 0.4% methanol in 40% ethanol.
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