Synergistic Extraction-Atomic Spectrophotometric Determination of Vanadium in Foods and Petroleum Crudes with 5,5′-Methylenedisalicylohydroxamic Acid (MEDSHA)
作者:
Gracia Bagur,
Domingo Gazquez,
Mercedes Sánchez,
AnaMa Martin,
期刊:
Analytical Letters
(Taylor Available online 1993)
卷期:
Volume 26,
issue 1
页码: 125-140
ISSN:0003-2719
年代: 1993
DOI:10.1080/00032719308016800
出版商: Taylor & Francis Group
关键词: Vanadium determination;extraction;atomic absorption spectrometry;petroleum crudes;foods.
数据来源: Taylor
摘要:
A method is described for the flame atomic absorption spectrometry (AAS) determination of vanadium, down to microgram level, in food samples and petroleum crudes. The procedure is based on the synergistic extraction of the V(V)-5,5′-methylene-disalicylohydroxamic acid (MEDSHA) complex with a 0.5 M tributyl phosphate (TBP) solution in isobutyl methyl ketone (IBMK). The method is highly selective and has a detection limit of 0.019 μg.ml−1(Vorg./Vsq.= 0.2) and of 0.006 μg.ml−1(Vorg./Vsq.= 0.05), with a relative standard deviation (RSD) not exceeding 1.5% at a level of 2 μg.ml−1and 3% at a level of 0.4 μg.ml−1.
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