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A method for the classification of individual aerosol particles using computer controlled electron probe microanalysis is presented. It is based on chemical boundary conditions (CBC) and enables quick and easy processing of a large set of elemental concentration data (mass%), derived from the X-ray spectra of individual particles. The particles are first classified into five major classes (sea salt...
Ion chromatographic (IC) methods have been compared in order to achieve an optimal separation of fluoride, acetate and formate under various elution conditions on two formerly introduced analytical columns (i and ii) and a novel one (iii): (i) an IonPac AS14 (250mm×4mm I.D.), (ii) Allsep A-2 (150mm×4.6mm I.D.), and (iii) an IC SI-50 4E (250mm (length)×4mm (internal diameter - I.D.)). The IC conditions...
A novel electrothermal atomic absorption spectrometry (ETAAS) method was developed for the halogenation of refractory sample components (Er, Nd and Nb) of lithium niobate (LiNbO 3 ) and bismuth tellurite (Bi 2 TeO 5 ) optical single crystals to overcome memory effects and carry-over. For this purpose, the cleaning step of a regular graphite furnace heating program was replaced...
For the isocratic ion chromatography (IC) separation of low-molecular-mass organic acids and inorganic anions three different anion-exchange columns were studied: IonPac AS14 (9μm particle size), Allsep A-2 (7μm particle size), and IC SI-50 4E (5μm particle size). A complete baseline separation for all analyzed anions (i.e., F − , acetate, formate, Cl − , NO 2− , Br ...
A method for the separation of acetate and formate anions by ion chromatography has been optimized under various measurement conditions (e.g. the composition of the mobile phase, and the flow rate of the eluent). For this purpose, two different analytical columns were examined: the IonPac AS14 (250mm×4mm i.d.; designed mostly for the separation of inorganic anions) and the Allsep A-2 (150mm×4.6mm...
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