| 摘要 |
The system comprises two detection channels 11, 12, the first of which receives a mobile phase plus the analyte and the second of which receives only the mobile phase. Each channel has a detector 11, 12 comprising a microelectrode and a reference electrode for immersion in the received solution. An ac modulated voltage is applied across each pair of electrodes and the resulting current measured. Phase sensitive detection means 20 are provided for determining the faradic component of the current flowing between each pair of electrodes. The system further comprises means 21 for differentially combining the faradic components of the two channels and amplifier 22 for balancing the channels when mobile phase only is applied to both channels. <IMAGE> |
