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Membrane-based sample pre-treatment strategies in ultra-trace determination of metal ions in complex matrices

Djane, Nii-Kotey (1997)
Abstract (Swedish)
Popular Abstract in Swedish

I denna avhandling har olika analytiska provupparbetningsmetoder för bestämning av spårmetaller i komplexa matriser utvecklats och testats. I metod utvecklingen har både porösa och icke-porösa membraner använts för provrening och anrikning före slutanalys med atom absorptions spektrometri (både med flamma och grafitugns tekniken) och stripping voltammetri.



De metaller som har bestämts i detta arbete inkluderar Al i model loösningar, Cd, Co, Cu, Ni och Pb i rent och i naturliga vattenlösningar. Pb har ackså bestämts i urinprover av blyexponerade personer och Cr i helblod.



Olika masstransport mekanismer för vätske-membran extractionstekniken hat utnyttjats.... (More)
Popular Abstract in Swedish

I denna avhandling har olika analytiska provupparbetningsmetoder för bestämning av spårmetaller i komplexa matriser utvecklats och testats. I metod utvecklingen har både porösa och icke-porösa membraner använts för provrening och anrikning före slutanalys med atom absorptions spektrometri (både med flamma och grafitugns tekniken) och stripping voltammetri.



De metaller som har bestämts i detta arbete inkluderar Al i model loösningar, Cd, Co, Cu, Ni och Pb i rent och i naturliga vattenlösningar. Pb har ackså bestämts i urinprover av blyexponerade personer och Cr i helblod.



Olika masstransport mekanismer för vätske-membran extractionstekniken hat utnyttjats. Genom automatisering och on-line koppling med de olika slutanalysinstrumenten har man kunat man minska både provupparbetningstiden och kontamineringsrisken.



Arbete inom provtagningsområde har resulterat i en filtreringsenhet baserad på ett polysulfonmembran. Denna har använts för prover innehållande hög humushalt före provanrikning på en kelatjonbytarekolon. (Less)
Abstract
In the present thesis, analytical sample pre-treatment methods for the determination of trace metal ions in complex matrices were developed and tested. These methods were based on membrane fractionation, clean-up and enrichment of analytes and applied to the determination of aluminium, cadmium, cobalt, chromium, copper, nickel and lead in biological and environmental samples.



In one application different mass transport mechanisms were tested for analyte pre-concentration and matrix isolation with Supported Liquid Membrane (SLM) extraction. Mechanisation, automation and on-line coupling of the SLM technique to the atomic absorption spectrometry (AAS) or potentiometric stripping analysis (PSA) instrumentation increased the... (More)
In the present thesis, analytical sample pre-treatment methods for the determination of trace metal ions in complex matrices were developed and tested. These methods were based on membrane fractionation, clean-up and enrichment of analytes and applied to the determination of aluminium, cadmium, cobalt, chromium, copper, nickel and lead in biological and environmental samples.



In one application different mass transport mechanisms were tested for analyte pre-concentration and matrix isolation with Supported Liquid Membrane (SLM) extraction. Mechanisation, automation and on-line coupling of the SLM technique to the atomic absorption spectrometry (AAS) or potentiometric stripping analysis (PSA) instrumentation increased the sample throughput and kept contamination under control.



In another application, a polysulfone ultrafiltration membrane was used for the removal of particulate matter from humic acid-like substances solutions before analyte enrichment on a chelating ion-exchange column. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Prof Buffle, Jacques, University of Geneva, Switzerland
publishing date
type
Thesis
publication status
published
subject
keywords
PSA, AAS, coupled-counter transport, complex matrix, preconcentration, trace metal, sample pre-treatment, Membranes, automation, ICP-MS, Analytical chemistry, Analytisk kemi
pages
125 pages
publisher
Analytical Chemistry, Lund University
defense location
Lecture hall C, Center for Chemistry and Chemical Engineering, Sölvegatan 39
defense date
1997-06-29 10:15
external identifiers
  • Other:ISRN: LUNKDL/ (NKAK-1038)/1-125 (1997)
language
English
LU publication?
no
id
ff44c3bc-10f0-44a2-8ddf-cf840061ec88 (old id 29521)
date added to LUP
2007-06-13 09:39:19
date last changed
2016-09-19 08:45:13
@misc{ff44c3bc-10f0-44a2-8ddf-cf840061ec88,
  abstract     = {In the present thesis, analytical sample pre-treatment methods for the determination of trace metal ions in complex matrices were developed and tested. These methods were based on membrane fractionation, clean-up and enrichment of analytes and applied to the determination of aluminium, cadmium, cobalt, chromium, copper, nickel and lead in biological and environmental samples.<br/><br>
<br/><br>
In one application different mass transport mechanisms were tested for analyte pre-concentration and matrix isolation with Supported Liquid Membrane (SLM) extraction. Mechanisation, automation and on-line coupling of the SLM technique to the atomic absorption spectrometry (AAS) or potentiometric stripping analysis (PSA) instrumentation increased the sample throughput and kept contamination under control.<br/><br>
<br/><br>
In another application, a polysulfone ultrafiltration membrane was used for the removal of particulate matter from humic acid-like substances solutions before analyte enrichment on a chelating ion-exchange column.},
  author       = {Djane, Nii-Kotey},
  keyword      = {PSA,AAS,coupled-counter transport,complex matrix,preconcentration,trace metal,sample pre-treatment,Membranes,automation,ICP-MS,Analytical chemistry,Analytisk kemi},
  language     = {eng},
  pages        = {125},
  publisher    = {ARRAY(0x8305bc8)},
  title        = {Membrane-based sample pre-treatment strategies in ultra-trace determination of metal ions in complex matrices},
  year         = {1997},
}