Chemical separation and D. C. arc-atomic emission spectrometric and inductively coupled argon plasma atomic emission spectrometric methods for trace characterization of high purity thorium oxide

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Analytical Letters; (United States)

DOI:https://doi.org/10.1080/00032719008052433· OSTI ID:5756385

Bangia, T R; Adya, V C; Dhawale, B A; Rajeswari, B; Sastry, M D; Natarajan, P R ^[1]

---

1. Bhabha Atomic Research Centre, Bombay (India)

Chemical separation procedures using solvent extraction methods for the quantitative separation of rare earths from Th0{sub 2} have been examined using Di-2-ethyl hexyl phosphoric acid (HDEHP)/HNO{sub 3}, HDEHP/Hcl, Tri n-octyl phosphine oxide (TOPO)/HNO{sub 3} and TOPO/HCl systems. The efficiency of these systems was determined using radioactive tracers and emission spectrographic methods. Gamma radioactive tracers of {sup 141}Ce, {sup 152-154}Eu, {sup 153}Gd, {sup 170}Tm, {sup 169}Yb were used in tracer experiments. The TOPO/HCl and HDEHP/HCl systems (0.5 M TOPO/xylene in 6 M HCl and 0.1 M HDEHP/xylene in 4 M HCl) were found to be suitable for quantitative retention of rare earths in aqueous phase. The quantitative extraction of thorium into the organic phase was established by optical emission spectrometric methods. The methods developed here are found to be suitable for the determination of rare earths viz., La, Ce, Dy, Er, Eu, Gd, Ho, Lu, Sm, Tb, Yb, Sc and also Y in thoria samples by atomic emission spectrometry.

• OSTI ID: 5756385
• Journal Information: Analytical Letters; (United States), Vol. 23:1; ISSN 0003-2719
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
RARE EARTHS
EMISSION SPECTROSCOPY
SEPARATION PROCESSES
THORIUM OXIDES
CHEMICAL ANALYSIS
AQUEOUS SOLUTIONS
CERIUM
CERIUM 141
DYSPROSIUM
ELEMENTS
ERBIUM
EUROPIUM
EUROPIUM 152
EUROPIUM 153
EUROPIUM 154
EXPERIMENTAL DATA
GADOLINIUM
GADOLINIUM 153
HDEHP
HOLMIUM
HYDROCHLORIC ACID
LANTHANUM
LUTETIUM
PLASMA
SAMARIUM
SAMPLE PREPARATION
SCANDIUM
SOLVENT EXTRACTION
TERBIUM
THULIUM 170
TOPO
TRACE AMOUNTS
TRACER TECHNIQUES
XYLENES
YTTERBIUM
YTTERBIUM 169
YTTRIUM
ACTINIDE COMPOUNDS
ALKYLATED AROMATICS
AROMATICS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CERIUM ISOTOPES
CHALCOGENIDES
CHLORINE COMPOUNDS
DATA
DAYS LIVING RADIOISOTOPES
DISPERSIONS
ELECTRON CAPTURE RADIOISOTOPES
ESTERS
EUROPIUM ISOTOPES
EVEN-ODD NUCLEI
EXTRACTION
GADOLINIUM ISOTOPES
HALOGEN COMPOUNDS
HOURS LIVING RADIOISOTOPES
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
METALS
MINUTES LIVING
MINUTES LIVING RADIOISOTOPES
MIXTURES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHINE OXIDES
PHOSPHINES
PHOSPHORIC ACID ESTERS
PHOSPHORUS COMPOUNDS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SECONDS LIVING RADIOISOTOPE
SOLUTIONS
SPECTROSCOPY
STABLE ISOTOPES
THORIUM COMPOUNDS
THULIUM ISOTOPES
TRANSITION ELEMENTS
400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials
400105 - Separation Procedures
400102 - Chemical & Spectral Procedures