A new generation of graphite furnace atomic absorption spectrometer enables the simultaneous determination of several trace elements. Using an optimized temperature-time-program for ashing and atomization, the Smith-Hieftje background correction and a matrix modifier, the determination of Pb, Cd and Ni in one run is possible. The detection limits of the new method of 0,039 mg Pb, 0,006 mg Cd and 0,022 mg Ni per kg sample, permit the determination of these elements in soils, foodstuffs and human food. These detection limits comply with the guidelines of the "Zentrale Erfassungs- und Bewertungsstelle für Umweltchemikalien" (central registration- and assessment office for environmental chemicals) of the "Bundesgesundheitsamt" (german public health department). The new multielement method reduces measurement time and costs, i.e. graphite tubes, gas, matrix modifier, reference material and sample solution, in comparison to conventional single-element GF-AAS.
In methanolischer Lösung von Alkylammoniumfluoroferraten(III) wird das Vorliegen von (FeF6)3−bei Fluoridüberschuß nachgewiesen. Für die untersuchten polykristallinen Verbindungen (NH3CH3)FeF4, (NH3CH2)2FeF5 und (NH3CH3)3FeF6 werden durch Anpassung von Modellfunktionen an die experimentellen EPR‐Spektren Strukturaussagen abgeleitet.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.