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Related Experiment Videos

Arsenic speciation by capillary gas-liquid chromatography.

K Dix, C J Cappon, T Y Toribara

    Journal of Chromatographic Science
    |April 1, 1987
    PubMed
    Summary

    This study presents a method to measure environmental arsenic compounds using gas-liquid chromatography. The technique efficiently detects and quantifies inorganic and organic arsenicals in various sample types.

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    Area of Science:

    • Environmental Chemistry
    • Analytical Chemistry

    Background:

    • Arsenic compounds pose environmental and health risks.
    • Accurate determination of specific arsenic species is crucial for risk assessment.

    Purpose of the Study:

    • To develop and evaluate a method for quantifying environmentally significant arsenic compounds.
    • To analyze inorganic (arsenite, arsenate) and organic (monomethylarsonate, dimethylarsinate) arsenicals.

    Main Methods:

    • Capillary gas-liquid chromatography with temperature programming.
    • Derivatization of arsenic compounds to methylthioglycolate derivatives.
    • Separation on wide-bore borosilicate glass and fused-silica columns.
    • Evaluation of flame-ionization and electron-capture detection.

    Main Results:

    • Simultaneous separation and detection of derivatized arsenic species were achieved.
    • A simple and rapid sample preparation method was established for water, urine, blood, and tissue.
    • The derivatization technique could not differentiate between inorganic arsenate and arsenite.

    Conclusions:

    • The developed gas-liquid chromatography method provides a reliable way to determine specific arsenic compounds.
    • The method is applicable to diverse environmental and biological matrices.
    • Further refinement may be needed to distinguish between arsenate and arsenite.

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