349 Result(s)
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Ionen-chromatographische Bestimmung von Chlorid in Zement
The concentration of chloride in cement samples can be determined by ion-chromatography after digestion of the material with nitric acid. For the elimination of interfering nitrate and other matrix components ...
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Liquid column-chromatographic separation and determination of long-chain primary n-alkylamines (n-C10H21NH2 to n-C22H45NH2) after their fluorescence derivatization with salicylaldehyde diphenylboron chelate
Langkettige primäre n-Alkylamine (Fettamine) wurden nach der Derivatisierung mit Salicyl-aldehyd-diphenylborchelat zu fluorescierenden chelatartigen Azomethinverbindungen mit Hilfe der „reversed-phase”-Hochlei...
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Hochdruckflüssigkeits-chromatographische Trennung und fluorimetrische Bestimmung primärer α,ω-Diamine nach der Derivatisierung zu α,ω-Bis(2,2-diphenyl-1-oxa-3-azonia-2-borata-3-naphthyl)alkanen
The separation of 1,2-diaminoethane and the following homologues including 1,6-diaminohexane was carried out after their derivatization to fluorescent bis(diphenylboron) chelates of the α,ω-bis(salicylideneamino)...
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Erfahrungen zur Bestimmung von Vanadium mittels Atomabsorptions-Spektrometrie in Kohleöfen nach der Extraktion aus Meerwasser
For the determination of vanadium in sea water 4-(2-pyridylazo)resorcinol (PAR) in the presence of tetraphenylarsonium chloride (TPAC) and tetramethylene dithiocarbamate (TMDTC) were selected out of several ch...
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Zur Invers-Voltammetrie einiger Kupferchelate an der Kohlepaste-Elektrode. Bestimmung von Kupfer in Trinkwasser durch Oxidation von Kupferdithiooxamid
Dithio-oxamide, 2,2′-bichinoline, neocuproine and bathocuproine can be oxidized at the carbon paste electrode as well as the corresponding copper chelates. Particularly, dithio-oxamide is a convenient reagent ...
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Zur Bestimmung von Molybdän in Meerwasser mit verschiedenen Methoden
For the determination of molybdenum in sea water three methods are applied: Inverse voltammetry, atomic absorption (AAS), and X-ray fluorescence (XFS). Only the inverse voltammetric determination requires no a...
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Das voltammetrische Verhalten von Natrium-diethyldithiocarbamat an der Kohlepaste-Elektrode
The electrochemical behaviour of sodium diethyldithiocarbamate at the carbon paste electrode has been investigated using a base electrolyte containing acetate buffer (pH 4.8). The comparison of the cyclic-, di...
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Untersuchungen zur voltammetrischen Bestimmung von Molybdän in Gegenwart von Wolfram
The complex compound of molybdenum with sodium diethyldithiocarbamidate is reducible at the carbon paste electrode in a base electrolyte containing acetate buffer. The height of the reduction peak with the pea...
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Allgemeine analytische methoden, apparate und reagentien
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4. Biologisches Material
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Voltammetrische Bestimmung kleiner Eisenmengen ohne Abtrennung der Matrix
Iron in concentrated hydrochloric acid as well as in many other chloride solutions can be determined directly by use of a carbon paste electrode in the concentration range from 10−3 to 10−6%. At the limits of the...
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Eine rotierende Kohlepaste-Elektrode zur inversen Voltammetrie im Picogrammbereich
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Referate
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Bestimmung von Kupfer, Blei und Cadmium in unterschiedlichen Konzentrationsverhältnissen mit verschiedenen voltammetrischen Methoden
The voltammetric determination of copper, lead, and cadmium in the system Cu-Pb, Pb-Cd, and Cu-Pb-Cd can also be carried out, if these elements are present in very different concentrations. The way in which th...
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Invers-voltammetrische Bestimmung von Zinn und Blei nebeneinander an der Kohlepaste-Elektrode
The inverse-voltammetric determination of tin can be carried out in the presence of a 105-fold excess of lead by oxydation of the tin hematein complex on the carbon-paste electrode. For that purpose, to the solut...
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Zur Anwendung einer Nachelektrolyse bei der inversen Voltammetrie an festen Elektroden
The applicability of the carbon-paste electrode in the inverse voltammetry is not restricted to solutions which contain only one depolarizer. Disturbances, which are to be expected during the dissolution proce...
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3. Pharmazeutische Produkte
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II. Anorganisch Substanzen
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I. Allgemeine analytische Methoden, Apparate und Reagentien
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Referate