Atomic absorption spectrometric and synergistic spectrophotometric microdetermination of hafnium in alloys and environmental samples

Journal Article · Thu Mar 31 23:00:00 EST 1988 · Anal. Lett.; (United States)

DOI:https://doi.org/10.1080/00032718808081245· OSTI ID:7005556

Abbasi, S A

Hafnium (IV) was selectively extracted from 0.45-0.55 M HCl media as its chelate with N-p-methoxyphenyl-2-furylacrylohydroxamic acid (MFHA) into chloroform. Xylenol orange was added to the extract to form an intensely colored ternary complex measurable spectrophotometrically at 545 nm (epsilon = 8.3 x 10/sup 4/l mol/sup -1/ cm/sup -1/) with a sensitivity better than 0.002 ppm. For atomic absorption spectrometric determination, hafnium was extracted with MFHA into methyl isobutyl ketone and measured with 286.6 nm resonance line in the nitrous oxide-acetylene flame. The methods were applied to the analysis of hafnium in alloys, plant tissues, animal tissues and natural waters. The MFHA-xylenol orange reagent combination was chosen after studying ten hydroxamic acids and five chromogenic reagents.

• Research Organization: Centre for Water Resources Development and Management, Kerala (India)
• OSTI ID: 7005556
• Journal Information: Anal. Lett.; (United States), Journal Name: Anal. Lett.; (United States) Vol. 21:4; ISSN ANALB
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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
ALLOYS
AMINES
BODY
CHEMICAL ANALYSIS
DATA
DYES
ELEMENTS
EXPERIMENTAL DATA
EXTRACTION
HAFNIUM
HYDROGEN COMPOUNDS
HYDROXAMIC ACIDS
HYDROXY COMPOUNDS
INDICATORS
INFORMATION
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SPECTROPHOTOMETRY
SPECTROSCOPY
TISSUES
TRANSITION ELEMENTS
WATER
XYLENOL ORANGE