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Title: DETERMINATION OF SMALL AMOUNTS OF TANTALUM IN NaF-LiF-KF AND IN NaF-LiF-KF- UF$sub 4$

Abstract

The pyrogallol method was modified for the determination of small amounts cf tantalum in NaF- LiF--KF and NaF--LiF--KF--UF/sub 4/. In order to prevent the loss of tantalum during dissolution of the samples as the volatile fluoride, tantalum fluoride was hydrolyzed with dilute sulfuric acid prior to the complete removal of fluoride ions, which interfere with this method, by heating in concentrated sulfuric acid. Since uranium also interferes with tbe pyrogallol method, tetravalent uranium was oxidized to uranyl, and tantalum was separated from the oxidized uranium by precipitation with cupferron in a strong sulfuric acid solution. The coefficient of variation for the determination of tantalum in both types of samples was 2 per cent. (auth)

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab., Tenn.
OSTI Identifier:
4303639
Report Number(s):
CF-56-1-49
NSA Number:
NSA-13-000534
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Technical Report
Resource Relation:
Other Information: Decl. Sept. 26, 1958. Orig. Receipt Date: 31-DEC-59
Country of Publication:
United States
Language:
English
Subject:
CHEMISTRY; AMINES; CUPFERRON; HEATING; HYDROLYSIS; IMPURITIES; LITHIUM FLUORIDES; MEASURED VALUES; OXIDATION; PHENOLS; POTASSIUM FLUORIDES; PRECIPITATION; PYROGALLOL; QUALITATIVE ANALYSIS; SODIUM FLUORIDES; SULFURIC ACID; TANTALUM; TANTALUM FLUORIDES; TRACE AMOUNTS; URANIUM TETRAFLUORIDE; URANYL COMPOUNDS

Citation Formats

White, J C. DETERMINATION OF SMALL AMOUNTS OF TANTALUM IN NaF-LiF-KF AND IN NaF-LiF-KF- UF$sub 4$. United States: N. p., 1956. Web.
White, J C. DETERMINATION OF SMALL AMOUNTS OF TANTALUM IN NaF-LiF-KF AND IN NaF-LiF-KF- UF$sub 4$. United States.
White, J C. Tue . "DETERMINATION OF SMALL AMOUNTS OF TANTALUM IN NaF-LiF-KF AND IN NaF-LiF-KF- UF$sub 4$". United States.
@article{osti_4303639,
title = {DETERMINATION OF SMALL AMOUNTS OF TANTALUM IN NaF-LiF-KF AND IN NaF-LiF-KF- UF$sub 4$},
author = {White, J C},
abstractNote = {The pyrogallol method was modified for the determination of small amounts cf tantalum in NaF- LiF--KF and NaF--LiF--KF--UF/sub 4/. In order to prevent the loss of tantalum during dissolution of the samples as the volatile fluoride, tantalum fluoride was hydrolyzed with dilute sulfuric acid prior to the complete removal of fluoride ions, which interfere with this method, by heating in concentrated sulfuric acid. Since uranium also interferes with tbe pyrogallol method, tetravalent uranium was oxidized to uranyl, and tantalum was separated from the oxidized uranium by precipitation with cupferron in a strong sulfuric acid solution. The coefficient of variation for the determination of tantalum in both types of samples was 2 per cent. (auth)},
doi = {},
url = {https://www.osti.gov/biblio/4303639}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1956},
month = {1}
}

Technical Report:
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