On-chip capacitively coupled contactless conductivity detection using "injected" metal electrodes

Leigh Thredgold, Dmitriy Khodakov, Amanda Ellis, Claire Lenehan

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    We demonstrate the use of injected gallium electrodes for capacitively coupled contactless conductivity detection (C4D) within a microchip electrophoresis device. Evaluation of the electrodes for quantitative detection of electrophoretically separated lithium, sodium and potassium ions showed the system offers competitive detection limits of 6.1 × 10-6 M, 6.7 × 10-6 M and 8.5 × 10-6 M, respectively. The fabrication process is fast, highly reproducible, and eliminates difficulties with electrode alignment. Using this approach C4D can be readily achieved in any microchip by simply adding extra 'electrode' channels to the microchip design.

    Original languageEnglish
    Pages (from-to)4275-4279
    Number of pages5
    JournalAnalyst
    Volume138
    Issue number15
    DOIs
    Publication statusPublished - 2013

    Fingerprint Dive into the research topics of 'On-chip capacitively coupled contactless conductivity detection using "injected" metal electrodes'. Together they form a unique fingerprint.

  • Cite this