Environmental analysis of thorium (IV) by extractive separation with N-p-methoxyphenyl-2-furylacrylohydroxamic acid and spectrophotometric determination with 4-(2-pyridylazo) resorcinol
Thorium (IV) was separated from several anions and cations commonly associated with it in environmental samples by liquid-liquid extraction with N-p-methoxyphenyl 1-2-furyl-acrylohydroxamic acid (MFHA) into chloroform at pH 3.6 - 5.5. The metal was then back-extracted into aqueous media containing 1.8 - 2.2 M HCl and determined spectrophotometrically at 500 nm (epsilon = 3.9 x 10/sup 4/ 1 mol/sup -1/ cm/sup -1/) with 4-(2-pyridylazo) resorcinol (PAR). The method was successfully applied to the analysis of thorium in coal fly ash, monazite, uranium-thorium ore, animal tissue, plant tissue, and natural waters. MFHA and PAR were chosen from thirteen hydroxamic acids and nine pyridylazo reagents, as the reagent combination that provided the maximum selectivity and sensitivity.
- Research Organization:
- Pondicherry (Central) Univ. (India)
- OSTI ID:
- 6870643
- Journal Information:
- Anal. Lett.; (United States), Vol. 21:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
54 ENVIRONMENTAL SCIENCES
59 BASIC BIOLOGICAL SCIENCES
01 COAL, LIGNITE, AND PEAT
ANIMAL TISSUES
QUANTITATIVE CHEMICAL ANALYSIS
FLY ASH
FRESH WATER
HYDROCHLORIC ACID
SOLVENT PROPERTIES
HYDROXAMIC ACIDS
MONAZITES
PLANT TISSUES
THORIUM
SOLVENT EXTRACTION
SPECTROPHOTOMETRY
THORIUM ORES
URANIUM ORES
EXPERIMENTAL DATA
PH VALUE
ACTINIDE COMPOUNDS
ACTINIDES
AEROSOL WASTES
AMINES
ASHES
BODY
CHEMICAL ANALYSIS
DATA
ELEMENTS
EXTRACTION
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
MATERIALS
METALS
MINERALS
NUMERICAL DATA
ORES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RARE EARTH COMPOUNDS
RESIDUES
SEPARATION PROCESSES
THORIUM COMPOUNDS
THORIUM MINERALS
THORIUM PHOSPHATES
TISSUES
WASTES
WATER
400105* - Separation Procedures
400102 - Chemical & Spectral Procedures
400702 - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials
520200 - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)
550200 - Biochemistry
010600 - Coal
Lignite
& Peat- Properties & Composition