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Title: THE PHOTOMETRIC TITRATION OF BISMUTH WITH EDTA AND ITS APPLICATION TO THE DETERMINATION OF ZIRCONIUM

Abstract

The photometric method of end point detection has been applied to the direct titration of bismuth with EDTA using the iodide end point. The titration of milligram amounts of bismuth can be carried out in solutions in the pH range from 1.0 to 5.0 by suitable selection of the iodide concentration. Chloride interferes by causing turbidities in solution, and fluoride oonsiderably decreases the sensitivity by competing with the iodide for bismuth. Interference by sulfate, nitrate, and perchlorate is small, but tartrate and oxalate seriously interfere. In the application of this titration to the direct determination of the bismuth content of thorium base binary alloys, it provd possible to determine this constituent to better than 1% in alloys containing down to 2.5% of bismuth by using competitive complexation of thorium with sulfate ions. This titration has also been employed for the back-titration of excess EDTA in an indirect method for the determination of milligram amounts of zirconium. The methed is applicable directly to fluoridecontaining solutions, adjusted to pH 3, provided that beryllium ions are included to preferentially complex fluoride ions. It can be applied after the separation of zirconiam as its insoluble barium fluozirconate and solution of this precipitate in amore » mixture of boric and nitric acids. (auth)« less

Authors:
;
Publication Date:
Research Org.:
United Kingdom Atomic Energy Authority. Research Group. Atomic Energy research Establishment, Harwell, Berks, England
OSTI Identifier:
4303951
Report Number(s):
AERE-C/R-2494
NSA Number:
NSA-12-011305
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
United Kingdom
Language:
English
Subject:
CHEMISTRY; ACIDITY- BISMUTH- CHLORIDES- EDTA- ERRORS- FLUORIDES- IODIDES- MEASURED VALUES- NITRATES- PERCHLORIC ACID- PHOTOMETRY- QUALITATIVE ANALYSIS- QUANTITATIVE ANALYSIS- QUANTITY RATIO- SALTS- SENSITIVITY- SOLUTIONS- SULFATES- TITRATION- USES- ZIRCONIUM; ACIDS- BERYLLIUM- BERYLLIUM COMPLEXES- BORIC ACID- BORON COMPOUNDS- BORON OXIDES- CHEMICAL REACTIONS- EFFICIENCY- FLUORINE COMPLEXES- NITRIC ACID- ORGANIC ACIDS- OXALATES- PRECIPITATION- SEPARATION PROCESSES- SOLUBILITY- TARTARIC ACID- THORIUM ALLOYS- THORIUM COMPLEXES

Citation Formats

Milner, G W.C., and Bacon, A. THE PHOTOMETRIC TITRATION OF BISMUTH WITH EDTA AND ITS APPLICATION TO THE DETERMINATION OF ZIRCONIUM. United Kingdom: N. p., 1958. Web.
Milner, G W.C., & Bacon, A. THE PHOTOMETRIC TITRATION OF BISMUTH WITH EDTA AND ITS APPLICATION TO THE DETERMINATION OF ZIRCONIUM. United Kingdom.
Milner, G W.C., and Bacon, A. Sat . "THE PHOTOMETRIC TITRATION OF BISMUTH WITH EDTA AND ITS APPLICATION TO THE DETERMINATION OF ZIRCONIUM". United Kingdom.
@article{osti_4303951,
title = {THE PHOTOMETRIC TITRATION OF BISMUTH WITH EDTA AND ITS APPLICATION TO THE DETERMINATION OF ZIRCONIUM},
author = {Milner, G W.C. and Bacon, A},
abstractNote = {The photometric method of end point detection has been applied to the direct titration of bismuth with EDTA using the iodide end point. The titration of milligram amounts of bismuth can be carried out in solutions in the pH range from 1.0 to 5.0 by suitable selection of the iodide concentration. Chloride interferes by causing turbidities in solution, and fluoride oonsiderably decreases the sensitivity by competing with the iodide for bismuth. Interference by sulfate, nitrate, and perchlorate is small, but tartrate and oxalate seriously interfere. In the application of this titration to the direct determination of the bismuth content of thorium base binary alloys, it provd possible to determine this constituent to better than 1% in alloys containing down to 2.5% of bismuth by using competitive complexation of thorium with sulfate ions. This titration has also been employed for the back-titration of excess EDTA in an indirect method for the determination of milligram amounts of zirconium. The methed is applicable directly to fluoridecontaining solutions, adjusted to pH 3, provided that beryllium ions are included to preferentially complex fluoride ions. It can be applied after the separation of zirconiam as its insoluble barium fluozirconate and solution of this precipitate in a mixture of boric and nitric acids. (auth)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United Kingdom},
year = {1958},
month = {2}
}

Technical Report:
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