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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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ICP Analysis of Herbal Medicines
Shimadzu
The use of herbal medicines as an alternative to traditional western medicine has been increasing, accompanied by increased concern regarding their quality and safety. This note presents a high-throughput analysis using the calibration curve method of elements considered to have relatively high oral toxicity.
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EDXRF App Note: Sulfur and Chlorine in Oil
Scott Fess, Rigaku Corporation
Application note #1277 describes the analysis of sulfur and chlorine in oil is. The method is suitable for measurements in crude oil, cutting fluids, and used oils with high chlorine content.
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Raman Microspectroscopy of Plastic Explosives
Dr. Paul Martin, CRAIC Technologies
The identification of explosives has become a critical aspect of both homeland security and military operations. Identification, especially of post-blast residue, can be very challenging as there may only be trace amounts of the explosives available for analysis. Additionally, explosives are designed to undergo exothermic reactions with the application of energy. Since spectroscopic techniques used to analyze trace evidence require electromagnetic energy to be focused onto a microscopic sampling area, the energy flux is high and can lead to exothermic reactions in the sample of explosive. The purpose of this paper is to show results from the spectroscopic analysis of some explosive samples as well as to discuss the techniques used to acquire these spectra.
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Cell Culture Media Identification Using Handheld Raman
Claire Dentinger, PhD, Rigaku Raman Technologies, Inc.
Cell culture media plays an important role in biopharmaceutical production. Handheld Raman provides the means for nondestructive, cost effective, and efficient analysis of complex cell culture media essential for high quality process control. A study of synthetic cell culture media concluded that use of a handheld Raman analyzer equipped with a 1064 nm laser wavelength revealed distinct results.
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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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DST-1000 Acid Purification System
Don Potter, Savillex
The Savillex DST-1000 Acid Purification System produces high purity acid from low cost trace metal grade acid. It can be used to purify HNO3, HCl, and HF. The DST-1000 can pay for itself in a short period of time through the cost savings by using trace metal grade acid instead of bottled high purity acid.
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