Rapid assessment of the latent hazard posed by dissolved mercaptans within aqueous effluent

MM Villalba, VJ Litchfield, RB Smith, AM Franklin, NS Lawrence, J Davis

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    The presence of mercaptans (RSH) can usually be detected by their inherent noxious odour but there is a need to quantify the concentration within effluent and hence allow an assessment of the latent hazard to be made prior to disposal. The versatility of using naphthoquinone as a rapid derivatising agent through which to trap such species has been evaluated. The quinone moiety provides a label that can be quantified using colorimetric, electrochemical and chromatographic means and offers a significant advantage over conventional thiol labelling agents. The analytical characteristics of each approach have been investigated and the selectivity, sensitivity and applicability of the reaction system critically assessed for a range of model compounds. The naphthoquinone system has a detection limit in the low micromolar range with little interference from other components common to discharge water with 96% recovery of mercaptopropionate. The reaction to sulfide (HS-) has also been assessed and a disparity in response between the detection methods observed and a possible reaction pathway outlined.
    LanguageEnglish
    Pages444-450
    JournalJournal of Hazardous Materials
    Volume154
    Issue number1-3
    DOIs
    Publication statusPublished - Jun 2008

    Fingerprint

    Naphthoquinones
    thiol
    detection method
    Sulfhydryl Compounds
    odor
    Effluents
    Hazards
    sulfide
    hazard
    effluent
    Odors
    Sulfides
    Labeling
    Limit of Detection
    Labels
    Recovery
    water
    Water
    detection
    labelling

    Keywords

    • sulfur
    • sulfide
    • mercaptan
    • naphthoquinone
    • chromatography
    • analysis

    Cite this

    Villalba, MM ; Litchfield, VJ ; Smith, RB ; Franklin, AM ; Lawrence, NS ; Davis, J. / Rapid assessment of the latent hazard posed by dissolved mercaptans within aqueous effluent. In: Journal of Hazardous Materials. 2008 ; Vol. 154, No. 1-3. pp. 444-450.
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    abstract = "The presence of mercaptans (RSH) can usually be detected by their inherent noxious odour but there is a need to quantify the concentration within effluent and hence allow an assessment of the latent hazard to be made prior to disposal. The versatility of using naphthoquinone as a rapid derivatising agent through which to trap such species has been evaluated. The quinone moiety provides a label that can be quantified using colorimetric, electrochemical and chromatographic means and offers a significant advantage over conventional thiol labelling agents. The analytical characteristics of each approach have been investigated and the selectivity, sensitivity and applicability of the reaction system critically assessed for a range of model compounds. The naphthoquinone system has a detection limit in the low micromolar range with little interference from other components common to discharge water with 96{\%} recovery of mercaptopropionate. The reaction to sulfide (HS-) has also been assessed and a disparity in response between the detection methods observed and a possible reaction pathway outlined.",
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    Rapid assessment of the latent hazard posed by dissolved mercaptans within aqueous effluent. / Villalba, MM; Litchfield, VJ; Smith, RB; Franklin, AM; Lawrence, NS; Davis, J.

    In: Journal of Hazardous Materials, Vol. 154, No. 1-3, 06.2008, p. 444-450.

    Research output: Contribution to journalArticle

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