Analysis of Metal Ions in Environmental Samples - III Synergistic Determination of Vanadium (V) As its Mixed Complex with N-0-Methoxyphenyl-2-Thenohydroxamic Acid and 3-(0-Carboxyphenyl)-1-Phenyltriazine-N-0Xide
作者:
ShahidAbbas Abbesi,
期刊:
Analytical Letters
(Taylor Available online 1979)
卷期:
Volume 12,
issue 9
页码: 1027-1036
ISSN:0003-2719
年代: 1979
DOI:10.1080/00032717908059782
出版商: Taylor & Francis Group
关键词: Analysis;vanadium;mixed complex;spectrophotometry
数据来源: Taylor
摘要:
A highly sensitive, selective, and rapid method for the spectrophotometry determination of vanadium(V) at trace levels is described. The method is based on the selective extraction of vanadium(v) from strongly acidic (3–6 M hydrochloric acid) met ium with solution of N-0-methoxyphenyl-2- thenohydroxamic acid (0MTHA) in chloroform. The extract is then equilibrated with 3-(0-carboxyohenyl)-1-phenyltriazine-N-oxide(CPPTNO) at pH ≃ 1.5 and the resulting colour is measured at 445 nm. The colour system obeys Beer's law over the range 0–20 -μg/ml of vanadium; the molar absorptivityat the wavelength of maximum absorption (445 nm), and the Sandell sensitivity of the method are 1.1 × 1041. mole−1cm−1and 0.005 μg/ml respectively.
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