Controlled-potential coulometric determination of plutonium in the presence of iron

Toshiaki Hiyama, Tomio Kageyama

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A controlled-potential coulometry is proposed for the determination of plutonium in the presence of iron. Iron interferes because the differences in the formal potentials of the Fe2--Fe3+ and Pu3--Pu4+ couples are very small in sulfuric acid. Even small quantities of iron relative to plutonium can cause an appreciable error in the analysis, since the equivalent weight ratio of Pu : Fe is about 4 : 1. In order to remove the interference of iron, 1,10-phenanthroline was used as a complexing agent with iron. 1,10-phenanthroline reacts with iron(II) to form the complex, and the start of the oxidation potential was shifted to the positive side of about 100 mV from that of iron. To obtain the most accurate result, the mole ratio of 1.10-phenanthroline to iron was required to be more than 20-fold. The relative standard deviation was less than 0.3%.

Original languageEnglish
Pages (from-to)537-541
Number of pages5
JournalBunseki Kagaku
Volume49
Issue number7
DOIs
Publication statusPublished - Jan 1 2000
Externally publishedYes

Fingerprint

Plutonium
Iron
Coulometers
Phenanthrolines
Oxidation

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this

Controlled-potential coulometric determination of plutonium in the presence of iron. / Hiyama, Toshiaki; Kageyama, Tomio.

In: Bunseki Kagaku, Vol. 49, No. 7, 01.01.2000, p. 537-541.

Research output: Contribution to journalArticle

@article{8adac05f004f4df5aa44671977d804ca,
title = "Controlled-potential coulometric determination of plutonium in the presence of iron",
abstract = "A controlled-potential coulometry is proposed for the determination of plutonium in the presence of iron. Iron interferes because the differences in the formal potentials of the Fe2--Fe3+ and Pu3--Pu4+ couples are very small in sulfuric acid. Even small quantities of iron relative to plutonium can cause an appreciable error in the analysis, since the equivalent weight ratio of Pu : Fe is about 4 : 1. In order to remove the interference of iron, 1,10-phenanthroline was used as a complexing agent with iron. 1,10-phenanthroline reacts with iron(II) to form the complex, and the start of the oxidation potential was shifted to the positive side of about 100 mV from that of iron. To obtain the most accurate result, the mole ratio of 1.10-phenanthroline to iron was required to be more than 20-fold. The relative standard deviation was less than 0.3{\%}.",
author = "Toshiaki Hiyama and Tomio Kageyama",
year = "2000",
month = "1",
day = "1",
doi = "10.2116/bunsekikagaku.49.537",
language = "English",
volume = "49",
pages = "537--541",
journal = "Bunseki Kagaku",
issn = "0525-1931",
publisher = "公益社団法人日本分析化学会",
number = "7",

}

TY - JOUR

T1 - Controlled-potential coulometric determination of plutonium in the presence of iron

AU - Hiyama, Toshiaki

AU - Kageyama, Tomio

PY - 2000/1/1

Y1 - 2000/1/1

N2 - A controlled-potential coulometry is proposed for the determination of plutonium in the presence of iron. Iron interferes because the differences in the formal potentials of the Fe2--Fe3+ and Pu3--Pu4+ couples are very small in sulfuric acid. Even small quantities of iron relative to plutonium can cause an appreciable error in the analysis, since the equivalent weight ratio of Pu : Fe is about 4 : 1. In order to remove the interference of iron, 1,10-phenanthroline was used as a complexing agent with iron. 1,10-phenanthroline reacts with iron(II) to form the complex, and the start of the oxidation potential was shifted to the positive side of about 100 mV from that of iron. To obtain the most accurate result, the mole ratio of 1.10-phenanthroline to iron was required to be more than 20-fold. The relative standard deviation was less than 0.3%.

AB - A controlled-potential coulometry is proposed for the determination of plutonium in the presence of iron. Iron interferes because the differences in the formal potentials of the Fe2--Fe3+ and Pu3--Pu4+ couples are very small in sulfuric acid. Even small quantities of iron relative to plutonium can cause an appreciable error in the analysis, since the equivalent weight ratio of Pu : Fe is about 4 : 1. In order to remove the interference of iron, 1,10-phenanthroline was used as a complexing agent with iron. 1,10-phenanthroline reacts with iron(II) to form the complex, and the start of the oxidation potential was shifted to the positive side of about 100 mV from that of iron. To obtain the most accurate result, the mole ratio of 1.10-phenanthroline to iron was required to be more than 20-fold. The relative standard deviation was less than 0.3%.

UR - http://www.scopus.com/inward/record.url?scp=0034408947&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034408947&partnerID=8YFLogxK

U2 - 10.2116/bunsekikagaku.49.537

DO - 10.2116/bunsekikagaku.49.537

M3 - Article

VL - 49

SP - 537

EP - 541

JO - Bunseki Kagaku

JF - Bunseki Kagaku

SN - 0525-1931

IS - 7

ER -