D. Dancewicz

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A. Halpern

University of Münster

J. Malinowski

Wrocław University of Science and Technology

J. Narbutt

Instytut Chemii i Techniki Jądrowej

J. Minczewski

Polish Academy of Sciences

S. Szymczak

S. Wasowicz

Cooperative Institutions

Polish Academy of Sciences

Instytut Chemii i Techniki Jądrowej

Lawrence Berkeley National Laboratory

University of California, Berkeley

Karlsruhe Institute of Technology

University of Warwick

Chalmers University of Technology

State Planning Organization

Exploratorium

Wrocław University of Science and Technology

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DETERMINATION OF TRACES OF OXYGEN IN METALLIC SODIUM

J. Minczewski D. Dancewicz S. Wasowicz

The method is based on the formation of sodium amalgam with mercury. Sodium monoxide is insoluble in the resulting amalgam and floats on the surface. The amalgam is then completely removed by extraction with mercury. Amalgamation is performed in a special extractor in argon atmosphere which is previously purifted by passing it through a sodium --potassium alloy. Samples of sodium are stored in glass capsules. Following the extraction, sodium monoxide is dissolved in water, and oxygen is determined indirectly by flame photometry. Sodium is determined etther by hydrolyzing the amalgamate followed by titration of excess acid and sodium hydroxide to a phenolphthalein end point or by flame photometry. The size of the sample amounted to 1 g sodium. This method was used to determine oxygen in amounts above 50 ppm. The standard deviatlon of several series of analysis did not exceed 13 ppm. (auth)

Sodium hydroxide

Mercury

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Thermal Annealing of ¹²⁷Te Atoms in ^127mTe-Labelled Sodium Tellurate

Radiochimica Acta (1969)

A. Halpern D. Dancewicz

Tellurate

10.1524/ract.1969.11.1.31

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Thermal Annealing of ⁸²Br in Neutron-Irradiated p-Dibromobenzene

Radiochimica Acta (1967)

J. Narbutt D. Dancewicz A. Halpern

Neutron irradiation

10.1524/ract.1967.7.1.55

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Indirect MEthods in Flame Analysis. Part III. Indirect Flame Photometric Beryllium Determination in Beryllium Bronze. Report No. 63/VIII; INDIREKTE METHODEN IN DER FLAMMENANALYSE. TEIL III. INDIREKTE FLAMMENPHOTOMETRISCHE BERYLLIUMBESTIMMUNG IN BERYLLIUMBRONZEN

J. Malinowski D. Dancewicz

A method ior the determination of beryllium in beryllium bronze by depression oi the strontium emission was perfected. After dissolution of the alloy in nitric acid, the beryllium is separated with EDTA. Strontium standard solution is added, and the beryllium content is determined from the measurement of the depression of the original emission from a calibration curve. At beryllium contents of approximately 2%, the standard deviation is approxmately 0.l%. (tr-auth)

Nitric acid

Bronze

Beryllium oxide

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Thermal Annealing of Tellurium resulting from Isomeric Transition in Solid Sodium Tellurate

Nature (1964)

D. Dancewicz A. Halpern

Tellurate

Tellurium

10.1038/203856c0

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Research on the Flame Photometric Determination of Gallium, Indium, and Thallium. Report No. 113/VIII; UNTERSUCHUNGEN UBER DIE FLAMMENPHOTOMETRISCHE GALLIUM, INDIUM, UND THALLIUMBESTIMMUNG

J. Malinowski D. Dancewicz S. Szymczak

Inivestigations which were made to establish the suitability of the flame photometer for the quantitative determination of indium and thallium are described. For comparison and for the flame photometric determination of gallium, a Uvispek spectrophotometer was used. It was established that the anion perturbation of the emission common for alkaline earths does not occur in gallium, indium, and thallium. (tr-auth)

Thallium

Indium gallium nitride

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Atomic Radiobromine in Neutron-Irradiated p-Dibromobenzene

Radiochimica Acta (1969)

D. Dancewicz A. Halpern

10.1524/ract.1969.12.1.52

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Citations (2)