Thesis-1975-Kumar.pdf (6.08 MB)
Analytical studies of metal thiocyanate complexes
thesis
posted on 2018-11-14, 16:18 authored by Jagdish L. KumarSome onium compounds react with thiocyanate complex anions to
give stable coloured salts, which can be extracted into organic solvents.
This generally results in an increase in the apparent molar absorptivity
of the thiocyanate complexes and in their stability. Reactions of
thiocyanate complexes of molybdenum, niobium, and rhenium with
tetraphenylarsonium compounds have been critically studied in an
attempt to improve existing methods for determining trace amounts of
these metals.
A method has been developed for the determination of trace amounts
of molybdenum in steels or in other matrices. The optimal conditions
for the formation of the thiocyanate complex and for its extraction
were determined. Because of the high sensitivity, accuracy and
precision of the procedure, it is considered to be superior to other
chemical methods for the quantitative determination of molybdenum
in steels. Fifteen metals commonly found in steels were shown not
to interfere with the determination of molybdenum. Tungsten and niobium
however, do interfere, but can readily be masked with oxalic acid. A
forty-fold ratio of tungsten to molybdenum can be tolerated. [Continues.]
History
School
- Science
Department
- Chemistry
Publisher
© Jagdish Lal KumarPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
1975Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of the degree of Doctor of Philosophy at Loughborough University.Language
- en