Trennung des Thoriums von Uran und Bestimmung des ersten

Venkateswarlu, Ch.; Purushottam, A.; Rao, Bh. S. V. Raghava

doi:10.1007/bf00452276

Cited by 5 publications

(3 citation statements)

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“…Preparation of Precipitates. The thorium precipitates were prepared according to procedures described (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). In general, an aqueous solution of the organic acid was added to a boiling hot solution containing about 0.2 gram of thorium nitrate in 150 ml.…”

Section: Methodsmentioning

confidence: 99%

“…and minimum oxide temperatures. The precipitates examined have all been prepared previously: the thorium salts of stearic, pyrogallic, m-hydroxybenzoic (8), m-cresoxyacetic (8), benzoic (9,12), 2,4-dichlorophenoxyacetic (2), phenylacetic (1, 6), cinnamic (4,10,11), and o-aminobenzoic (anthranilic acid) (5) acids, and mercaptobenzothiazole (7).…”

Section: Ax Attemptmentioning

confidence: 99%

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Thermolysis of Thorium Precipitates Salts of Organic Acids

Wendlandt¹

1957

Anal. Chem.

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Section: Methodsmentioning

confidence: 99%

Section: Ax Attemptmentioning

confidence: 99%

Thermolysis of Thorium Precipitates Salts of Organic Acids

Wendlandt¹

1957

Anal. Chem.

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“…Some of these are new, and others are modifications and improvements of older procedures. The use of organic acids to precipitate thorium selectively has received wide attention (6, 10, 13- [45][46][47][48][49]51). Other precipitation methods investigated recently use selenious acid (2), iodic acid (45), potassium iodate (51), ammonia (3) at a controlled pH, and radioactive pyrophosphate (26) in which the activity of the excess pyrophosphate in the filtrate is measured.…”

mentioning

confidence: 99%

Spectrophotometric Determination of Thorium in Monazite Sands

Banks¹,

Byrd²

1953

Anal. Chem.

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Separation of small amounts of thorium from the cerite earths of monazite and other elements. Use of cinnamic acid

Krishnamurty

Venkateswarlu

1952

Recl. Trav. Chim. Pays‐Bas

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Cinnamic acid has been found to be a suitable reagent €or the estimation and separation of small amounts of thorium from the cerite earths of monazite. The latter in concentration upto 2000 fold may be conveniently separated in a single precipitation. Using this reagent a separation from other common elements may also be effected. The presence of a little nitric acid (about N/100) in the wash liquid is found useful in giving separations described particularly when dealing with relative1 y Iarge amounts of the cerite earths.The use of cinnamic acid as a reagent for the estimation of thorium and its separation from the cerite earths of monazite has been reported previously 1) and conditions have been given for the separation of thorium from about a fifty fold excess of the latter in a single operation. This communication describes a modification which enables estimation of micro quantities of thorium and its separation from large quantities of cerite earths, in fact cerite earths may well be rendered free from thorium. Interference from a variety of cations has also been investigated. E x p e r i m e n t a l .Reagents. Thorium nitrate.Thorium Nitrate (B.D.H.) reagent grade was further purified as described in a previous communication2). A stock solution containing 3.02 mg per 100 ml was prepared and used throughout the investigation.

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Trennung des Thoriums von Uran und Bestimmung des ersten

Cited by 5 publications

References 1 publication

Thermolysis of Thorium Precipitates Salts of Organic Acids

Thermolysis of Thorium Precipitates Salts of Organic Acids

Spectrophotometric Determination of Thorium in Monazite Sands

Separation of small amounts of thorium from the cerite earths of monazite and other elements. Use of cinnamic acid

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