The University of Southampton
University of Southampton Institutional Repository

Nanoscavenger based dispersion preconcentration: sub-micron particulate extractants for analyte collection and enrichment

Nanoscavenger based dispersion preconcentration: sub-micron particulate extractants for analyte collection and enrichment
Nanoscavenger based dispersion preconcentration: sub-micron particulate extractants for analyte collection and enrichment
A new approach has been developed for the preconcentration of analytes from solution using nanoscavengers; monodisperse functionalised particles of sub-micron dimensions, that can be suspended as a quasi-stable sol in an aqueous solution, and quantitatively recovered with the analyte by conventional filtration. No external agitation of the sample is required as the particles move naturally through the sample by Brownian motion, convection and sedimentation. By careful choice and control of their particle size and surface chemistries, nanoscavengers can be designed to suit a number of different analytical problems. Surface modification of these nanometre-sized particles, through the grafting of complexing or partitioning functional groups, can produce nanoscavengers having affinities for specific analytes and operating through a wide range of mechanisms from covalent bonding to hydrophobic interaction. The approach is illustrated by the development of an extraction-based preconcentration of metals from solution that employs sub-micron Stober-type silica spheres, the surfaces of which have been modified using chelating diamine and dithiocarbamate groups. The concept has potentially widespread applicability as it is neither limited to metal extractions, nor to the use of silica-based nanoscavengers. Minimal involvement of organic solvents make nanoscavengers a potentially environmentally benign ("green") alternative to many conventional solvent extraction techniques.
solid-phase extraction, modified silica-gel, antisense oligonucleotides, selective preconcentration, trace-metals, particles, nanoparticles, growth, route, water
0003-2654
1432-1438
Howard, Alan G.
05442044-6aed-4ad0-9c7e-b2aa4c912598
Khdary, Nezar H.
44d14b89-e0ee-434f-8292-623ffbf6f046
Howard, Alan G.
05442044-6aed-4ad0-9c7e-b2aa4c912598
Khdary, Nezar H.
44d14b89-e0ee-434f-8292-623ffbf6f046

Howard, Alan G. and Khdary, Nezar H. (2005) Nanoscavenger based dispersion preconcentration: sub-micron particulate extractants for analyte collection and enrichment. Analyst, 130 (10), 1432-1438. (doi:10.1039/b506242j).

Record type: Article

Abstract

A new approach has been developed for the preconcentration of analytes from solution using nanoscavengers; monodisperse functionalised particles of sub-micron dimensions, that can be suspended as a quasi-stable sol in an aqueous solution, and quantitatively recovered with the analyte by conventional filtration. No external agitation of the sample is required as the particles move naturally through the sample by Brownian motion, convection and sedimentation. By careful choice and control of their particle size and surface chemistries, nanoscavengers can be designed to suit a number of different analytical problems. Surface modification of these nanometre-sized particles, through the grafting of complexing or partitioning functional groups, can produce nanoscavengers having affinities for specific analytes and operating through a wide range of mechanisms from covalent bonding to hydrophobic interaction. The approach is illustrated by the development of an extraction-based preconcentration of metals from solution that employs sub-micron Stober-type silica spheres, the surfaces of which have been modified using chelating diamine and dithiocarbamate groups. The concept has potentially widespread applicability as it is neither limited to metal extractions, nor to the use of silica-based nanoscavengers. Minimal involvement of organic solvents make nanoscavengers a potentially environmentally benign ("green") alternative to many conventional solvent extraction techniques.

Full text not available from this repository.

More information

Published date: 17 August 2005
Keywords: solid-phase extraction, modified silica-gel, antisense oligonucleotides, selective preconcentration, trace-metals, particles, nanoparticles, growth, route, water

Identifiers

Local EPrints ID: 20828
URI: http://eprints.soton.ac.uk/id/eprint/20828
ISSN: 0003-2654
PURE UUID: 174e0354-9096-4350-8c61-4d360b80ff03

Catalogue record

Date deposited: 01 Mar 2006
Last modified: 15 Jul 2019 19:25

Export record

Altmetrics

Contributors

Author: Alan G. Howard
Author: Nezar H. Khdary

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×