Uranium as an Activator

Nichols, Edward L.; Slattery, Mabel K.

doi:10.1364/josa.12.000449

Cited by 56 publications

(11 citation statements)

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“…Uranium silicates, micas, and compounds which contain exclusively U(IV) are not fluorescent (Booman and Rein, 1962, p. 60). Nichols and Slattery (1926) discovered that uranium will fluoresce very strongly when fused in sodium fluoride. This fluorescence is stronger than that of the most highly fluorescent uranium minerals.…”

Section: The Fluorimetric Uranium Methodsmentioning

confidence: 99%

Determination of uranium in natural waters

1965

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A method is described for the determination of very low concentrations of uranium in water. The method is based on the fluorescence of uranium in a pad prepared by fusion of the dried solids from the water sample with a flux of 10 percent NaF 45.5 percent Na2 CO3 , and 45.5 percent K2 CO3. This flux permits use of a low fusion temperature and yields pads which are easily removed from the platinum fusion dishes for fluorescence measurements. Uranium concentrations of less than 1 microgram per liter can be determined on a sample of 10 milliliters, or less. The sensitivity and accuracy of the method are dependent primarily on the purity of reagents used, the stability and linearity of the fluorimeter, and the concentration of quenching elements in the water residue. A purification step is recommended when the fluorescence is quenched by more than 30 percent. Equations are given for the calculation of standard deviations of analyses by this method. Graphs of error functions and representative data are also included.

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Section: The Fluorimetric Uranium Methodsmentioning

confidence: 99%

Determination of uranium in natural waters

1965

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“…The first really quantitative fluorescence intensity measurements were made in 1920 by L. J. Desha (17), who used a modification of a variable-path-length nephelometer (something like a Duhoscq colorimeter). In this very important early work, Desha established that the intensity of fluorescence increased linearly with concentration at low concentrations, an observation which was subsequently verified on a photoelectric fluorometer by F. H. Cohen in 1935 (74). Another important early paper describing quantitative work with a visual comparator type instrument was that by Bayle, Fabre, and George in 1925 (12).…”

Section: Instrumentationmentioning

confidence: 96%

Development of luminescence spectrometry as an analytical tool

O’Haver¹

1978

J. Chem. Educ.

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“…Pure and doped NaF crystals are known not only as model objects for fundamental research but as laser media and optical materials as well [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Among doped NaFcompounds the bulk crystals doped with uranium are the most promising [1][2][3][4][5][6] due to their high intensity green luminescence.…”

Section: Introductionmentioning

confidence: 99%

“…Among doped NaFcompounds the bulk crystals doped with uranium are the most promising [1][2][3][4][5][6] due to their high intensity green luminescence. Recently NaF:U compounds have been obtained in a form of fiber crystals [8,9].…”

Section: Introductionmentioning

confidence: 99%