Determination of phosphonate chelating agents by capillary electrophoresis

Kaija Luomanperä, Pertti Vastamäki, Heini Saloniemi, Heli Siren

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


    Synthetic chelating agents have shown increasing demand for many industrial and laboratory scale cleaning and finishing processes. These ligands have been used in a variety of metal speciation applications by complexation of metals with the chelating compounds. Especially phosphonate chelating agents are important compounds in different kind of industrial, environmental, biological, geological and medicine applications. Besides of the uptake of metals the interests in the use of phosphonate compounds are their stability under many industrial and environmental conditions and ability to buffer free metal ion activities in various media. For the investigation of the above mentioned samples and their degradation products capillary electrophoresis has been found a possible alternative due to its efficiency and sensitivity. In this study, we have developed a capillary electrophoresis method for monitoring of decomposition of three commercial complexones such as CDTA, DTPMP and HEDP in elevated temperature of the thermostated bath. Sampling from the bath was performed using certain time interval and the remaining of each compound was measured from the peak area of the electropherogram. In additon, detection limit for each chelating agent was determined without thermal stimulus in the aqueous media.
    Original languageEnglish
    Title of host publicationITP 2002, 13th International Symposium on Capillary Electroseparation Techniques
    Subtitle of host publicationprogram and book of abstracts
    Place of PublicationHelsinki
    PublisherUniversity of Helsinki
    Publication statusPublished - 2002
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event13th International Symposium on Capillary Electroseparation Techniques - Helsinki, Finland
    Duration: 1 Sept 20024 Sept 2002


    Conference13th International Symposium on Capillary Electroseparation Techniques


    • capillary electrophoresis
    • chelating agent
    • HEDP
    • DTPMP
    • CDTA


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