Abstract.
The design and the analytical performance of a miniaturized cell based on the electrochemiluminescence (ECL) detection principle are described. The micro ECL cell was made from a composite electrode probe with three-electrode configuration and an optical fiber, and its volume was fabricated as small as 50 µL. Besides the advantages of low cost fabrication, and easy operation, it provided better light collecting efficiencies (i.e. higher sensitivity) which resulted in the improvement of sensitivity and reproducibility in comparison with those of larger volume cells. The sensitivity was further improved by ultrasonically vibrating the electrode probe during the ECL measurements. Detection limits of tripropylamine (TPA), oxalate and ascorbic acid were of 0.1, 30, and 0.2 µM (signal to noise ration; S/N≥3), respectively. The advantages of versatility, sensitivity, and accuracy make the device attractive for the determination of trace components in routine analysis.
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Hiroi, T., Inui, A., Jin, J. et al. Microscale Electrochemiluminescence Analysis with an Ultrasonic Vibration Electrode. Microchim Acta 154, 269–274 (2006). https://doi.org/10.1007/s00604-006-0571-4
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DOI: https://doi.org/10.1007/s00604-006-0571-4