Atomic absorption spectrometric and spectrophotometric trace analysis of indium in environmental samples
Indium (III) was selectively extracted at pH 5.2 - 5.9 with N-p-methoxyphenyl-2-furylacrylohydroxamic acid (MFHA) into chloroform. BPAR (5-bromo-4(2-pyridylazo) resorcinal) was added to the extract to form an intensely red colored ternary complex measurable spectrophotometrically at 515 nm (epsilon = 5.81 x 10/sup 4/ 1 mol/sup -1/ cm/sup -1/). The extraction system enabled enrichment of indium and determination of the metal down to 10/sup -4/ ppm (0.1 ppb) levels. For atomic absorption spectrometric determination, indium was extracted with MFHA into methyl isobutyl ketone and measured at 303.9 nm resonance line in the air-acetylene flame. Both the methods were successfully applied to the determination of indium in ore, animal/plant tissue and natural waters. The MFHA-BPAR reagent combination was chosen from a study of eleven new hydroxamic acids and nine pyridylazo reagents.
- Research Organization:
- Pondicherry (Central) Univ. (India)
- OSTI ID:
- 6870765
- Journal Information:
- Anal. Lett.; (United States), Journal Name: Anal. Lett.; (United States) Vol. 21:9; ISSN ANALB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
550200 -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
ABSORPTION SPECTROSCOPY
AMINES
ANIMAL TISSUES
BODY
CHEMICAL ANALYSIS
DATA
ELEMENTS
EXPERIMENTAL DATA
EXTRACTION
FRESH WATER
HYDROGEN COMPOUNDS
HYDROXAMIC ACIDS
HYDROXY COMPOUNDS
INDIUM
INFORMATION
KETONES
METALS
NUMERICAL DATA
ORES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
PLANT TISSUES
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SPECTROPHOTOMETRY
SPECTROSCOPY
TISSUES
TRACE AMOUNTS
WATER