Atomic Absorption Spectrometric and Synergistic Spectrophotometric Microdetermination of Hafnium in Alloys and Environmental Samples
作者:
S.A. Abbasi,
期刊:
Analytical Letters
(Taylor Available online 1988)
卷期:
Volume 21,
issue 4
页码: 653-665
ISSN:0003-2719
年代: 1988
DOI:10.1080/00032718808081245
出版商: Taylor & Francis Group
关键词: AAS;Environment;Extraction;Hafnium;Spectrophotometry
数据来源: Taylor
摘要:
Hafnium (IV) was selectively extracted from 0.45–0.55 M HC1 media as its chelate with N-p-methoxyphenyl-2-furylacrylo-hydroxamic acid (MFHA) into chloroform. Xylenol orange was added to the extract to form an intensely coloured ternary complex measurable spectrophotometrically at 545 nm (ε = 8.3×1041 mol−1cm−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.
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