HARRICK PLASMA

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

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 x 10-6 M, 6.7 x 10-6-64D can be readily achieved in any microchip by simply adding extra electrode channels to the microchip design.

Thredgold, Leigh D., Dmitriy A. Khodakov, Amanda V. Ellis, Claire E. Lenehan

The Analyst

138

4275-4279

2013

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