Use of flow injection and sequential injection analysis schemes for the determination of trace-level concentrations of metals in complex matrices by ETAAS and ICPMS

Elo Harald Hansen

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    Despite their excellent analytical chemical capacities for determination of low levels of metal species, electrothermal atomic absorption spectrometry and inductively coupled plasma mass spectrometry often require suitable pretreatment (separation and preconcentration) of the sample material to facilitate the desired sensitivity and selectivity of measurement. Such pretreatment schemes are advantageously performed in flow injection (FI) or sequential injection (SI) manifolds, where all unit operations can be effected on-line and under enclosed and strictly controlled conditions. Various separation/preconcentration procedures are feasible, such as liquid-liquid extraction (possibly including back extraction), (co)precipitation with collection in knotted coils, adsorption on hydrophilic or hydrophobic reactors, hydride generation, or the use of ionexchange/chelating packed columns. After describing the particulars and characteristics of FI and SI, we present, via selected examples, various separation/preconcentration FI/Sl schemes for the determination of trace levels of metals, with particular emphasis on the use of the novel extension of FI/SI, that is, the so-called lab-on-valve concept.
    Original languageEnglish
    JournalJournal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering
    Volume40
    Issue number8
    Pages (from-to)1507-1524
    ISSN1093-4529
    DOIs
    Publication statusPublished - 2005
    Event2nd Asian International Conference on Ecotoxicology and Environmental Safety - Song-Khla, THAILAND
    Duration: 1 Jan 2004 → …

    Conference

    Conference2nd Asian International Conference on Ecotoxicology and Environmental Safety
    CitySong-Khla, THAILAND
    Period01/01/2004 → …

    Keywords

    • trace-level metal concentrations
    • preconcentration
    • lab-on-valve
    • sequential injection
    • separation
    • ICPMS
    • flow injection
    • ETAAS

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