Published 2000 | Version v1
Journal article Metadata-only

Determination of vanadium(5) and 8-hydroxyquinoline by oxidation of aniline with bromate ions in highly acidic solutions using spectrometry and thermal lensing

Creators

  • 1. MGU, Kafedra Analiticheskoj Khimii, Moscow (Russian Federation)

Description

When studying the rate of aniline oxidation by bromate-ions depending on the medium pH, it was revealed that pH reduction resulted in the change in characteristics of the reaction products absorption band. Physicochemical characteristics of the reaction considered occurring in highly acid medium (pH 2.4) were determined: pseudoorders in terms of oxidizing and reducing agents and effective rate constants. It is shown that aniline oxidation by bromate-ions in a highly acid medium permits reducing detection limits of vanadium(5) and 8-hydroxyquinoline (as activator of vanadium catalytic activity) both for spectrophotometric and thermal lensing detection

Abstract (Russian)

При изучении зависимости скорости реакции окисления анилина бромат-ионами от рН среды обнаружено, что снижение рН приводит к изменению характеристик полосы поглощения продуктов реакции. Определены физико-химические характеристики рассматриваемой реакции в сильнокислой среде (рН 2,4): псевдопорядки по окислителю и восстановителю и эффективные константы скорости. Показано, что проведение реакции окисления анилина бромат-ионами в сильнокислой среде позволяет снизить пределы обнаружения ванадия(5) и 8-оксихинолина (как активатора каталитической активности ванадия) как при спектрофотометрическом, так и при термолинзовом детектировании

Additional details

Additional titles

Original title (Russian)
Определение ванадия(5) и 8-оксихинолина по реакции окисления анилина бромат-ионами в сильнокислой среде при помощи спектрофотометрии и термолинзовой спектрометрии

Publishing Information

Journal Title
Vestnik Moskovskogo Universiteta, Seriya 2. Khimiya
Journal Volume
41
Journal Issue
4
Journal Page Range
p. 247-250
ISSN
0579-9384

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
32016179
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ABSORPTION SPECTRA; ANILINE; AQUEOUS SOLUTIONS; BROMATES; CATALYSIS; CHEMICAL REACTION KINETICS; LASER SPECTROSCOPY; OXIDATION; OXINE; PH VALUE; QUANTITATIVE CHEMICAL ANALYSIS; SENSITIVITY; SPECTROPHOTOMETRY; VANADIUM COMPOUNDS
Descriptors DEC
AMINES; AROMATICS; AZAARENES; AZINES; BROMINE COMPOUNDS; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; DISPERSIONS; HALOGEN COMPOUNDS; HETEROCYCLIC COMPOUNDS; HOMOGENEOUS MIXTURES; HYDROXY COMPOUNDS; KINETICS; MIXTURES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; PYRIDINES; QUINOLINES; REACTION KINETICS; SOLUTIONS; SPECTRA; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
8 refs., 3 figs., 3 tabs.