Novel chelating silicas for the preconcentration of ultratrace metals in natural waters
Novel chelating silicas for the preconcentration of ultratrace metals in natural waters
A variety of amino functional compounds were attached to silica particles through the use of a 3-glycidoxypropyltrimethoxysilane intermediary. The resultant amines were also converted to their dithiocarbamates.
Characterisation of the immobilised functional groups was achieved and demonstrated the presence of a variety of different chemical structures on the silica surface.
The functionalised silicas were subjected to a rapid and efficient screening tehcnique which defined their chelating properties and revealed three modifying agents, ethylenediamine N.N'bis dithiocarbamate, diethylenetriamine monodithiocarbamate and propan-l,3-diamine, which were subjected to more intense study.
These three modifying agents were capable of preconcentrating copper, nickel, chromium, cobalt and cadmium in the 0.01-10 ug.l"1 range from estuarine water samples by a factor of 100 prior to determination by electrothermal atomic absorbtion.
University of Southampton
Taylor, Ian
6e0997cc-1d6c-4a12-95cb-422935d21693
1991
Taylor, Ian
6e0997cc-1d6c-4a12-95cb-422935d21693
Taylor, Ian
(1991)
Novel chelating silicas for the preconcentration of ultratrace metals in natural waters.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
A variety of amino functional compounds were attached to silica particles through the use of a 3-glycidoxypropyltrimethoxysilane intermediary. The resultant amines were also converted to their dithiocarbamates.
Characterisation of the immobilised functional groups was achieved and demonstrated the presence of a variety of different chemical structures on the silica surface.
The functionalised silicas were subjected to a rapid and efficient screening tehcnique which defined their chelating properties and revealed three modifying agents, ethylenediamine N.N'bis dithiocarbamate, diethylenetriamine monodithiocarbamate and propan-l,3-diamine, which were subjected to more intense study.
These three modifying agents were capable of preconcentrating copper, nickel, chromium, cobalt and cadmium in the 0.01-10 ug.l"1 range from estuarine water samples by a factor of 100 prior to determination by electrothermal atomic absorbtion.
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Published date: 1991
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Local EPrints ID: 460410
URI: http://eprints.soton.ac.uk/id/eprint/460410
PURE UUID: 86c75a63-543d-4141-8a05-f9ffe1abff78
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Date deposited: 04 Jul 2022 18:21
Last modified: 04 Jul 2022 18:21
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Author:
Ian Taylor
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