Chemical analysis of graphene oxide films after heat …

Based in the Baltimore-Washington metropolitan area, our materials analysis laboratory provides independent analytical knowledge and advice for a broad spectrum of commercial applications and market sectors. Each project is managed by at least one of our Ph.D. scientists. Our materials analysis laboratory has served many of the most respected organizations in industry and academia, as well as start-up, small, and medium-sized businesses, each of whose success is critically important to us.

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Flow Injection Analysis Techniques in Atomic Spectroscopy.

Chemical Analysis of Metals | Laboratory Testing Inc.

Hydrochloric acid digestion is not suitablefor samples, which will be analyzed by graphite furnace atomic absorptionspectroscopy because it can cause interferences during furnace atomization.

The process of atomic absorption spectroscopy ..

studied chemistry at the University of Gent, Belgium, and took his Ph.D. in 1976. After an Alexander-von-Humboldt scholarship, he joined the ISAS-Institute for Analytical Sciences, Dortmund, Germany, in 1978 and took the degree of “Geaggregeerde voor het hoger onderwijs” in 1985 at the University of Antwerp, Belgium, where he has lectured since 1983. In 1991, he became an associate professor for inorganic/analytical chemistry at the University of Dortmund; in 1998, he became a full professor of analytical chemistry at the University of Leipzig, Germany, and from 2002 onward at the University of Hamburg. In 2004, he became an adjunct professor of chemistry at Indiana University, Bloomington, USA. His research interests are problem-oriented analytical chemistry with special reference to the determination of the elements and their species mainly by plasma atomic spectrochemical methods.


Laser Ablation–Based Chemical Analysis ..

Manufacturers often encounter unknown materials in their processes. Such materials include an unknown substance discovered in the manufacturing process, a suspect material from a new supplier, or a poorly-performing material. Constellation specializes in the identification of most types of materials, including metals, plastics, minerals and liquids. Most materials can be identified based on chemical composition and physical properties. The material identifications can range from extensive analyses to ensure high-quality materials to positive material identification (PMI) screening methods for rapid comparison of unknown materials to known samples.

Atomic Emission Spectroscopy) ..

AB - In this work the relationship between the chemical composition and atomic volume in the Ag-x % Zn (x ≤ 20) system was studied. For this purpose, 10 solid solutions were obtained by means of casting and mechanical alloying. The microstructural characterization was carried out by means of X ray diffraction. The lattice parameter was obtained using the Rietveld's method, while the chemical composition was determined by dispersive energy X-ray spectroscopy. Based on the results obtained, it can be concluded that there is an inverse lineal relationship between the atomic volume of the solid solution and its Zn concentration, which shows a negative deviation from Vegard's law (-2.96%). Additionally, it was proposed an equation which relates the Zn concentration with the atomic volume of the solid solution, which showed a prediction error less than 12%.

Journal of Chemical Education 2016 93 (4) ..

studied chemistry at the University of Dortmund (Germany), where he received his Diploma and Ph.D. degrees in 1993 and 1996, respectively. He worked for one year each as a postdoctoral researcher in the Department of Chemistry at the University of Alberta, Edmonton (Canada) and at the Laboratory for Spectrochemistry, Bloomington, Indiana (USA). From 1999−2002 and 2002−2005, he was a scientific assistant at the University of Leipzig and University of Hamburg (both Germany), respectively. After finishing his Habilitation in 2005, he became Assistant Professor at the University of Hamburg and Visiting Professor at the University of Leipzig. Since 2008, he is a Professor of Analytical Chemistry at the Johannes Gutenberg-University Mainz, Germany. His current research activities include the development and application of new analytical techniques in plasma source mass and emission spectrometry with focus on sample introduction, laser ablation, and miniaturized analysis systems for trace elemental determination.

trace analysis, moisture analysis, chemical ..

N2 - In this work the relationship between the chemical composition and atomic volume in the Ag-x % Zn (x ≤ 20) system was studied. For this purpose, 10 solid solutions were obtained by means of casting and mechanical alloying. The microstructural characterization was carried out by means of X ray diffraction. The lattice parameter was obtained using the Rietveld's method, while the chemical composition was determined by dispersive energy X-ray spectroscopy. Based on the results obtained, it can be concluded that there is an inverse lineal relationship between the atomic volume of the solid solution and its Zn concentration, which shows a negative deviation from Vegard's law (-2.96%). Additionally, it was proposed an equation which relates the Zn concentration with the atomic volume of the solid solution, which showed a prediction error less than 12%.