A Study on Double Inputs Direct Contact and Single Output Capacitively Coupled Conductivity Detector.

ABSTRACT: In this paper, an improved double inputs direct contact and single output capacitively coupled conductivity detector (DISODCD) based on traditional contactless capacitively coupled conductivity detector (C4D) is developed. The sensor uses double inputs of the contact electrode and capacitively coupled output of the contactless electrode and a lock-in amplifier to reduce interfering noise signals and amplify gain. Parallel circuit counteracts the part of the adverse capacitance reactance introduced by electrode polarization and reduces the effect of the impedance caused by the coupled wall capacitance to measure the resistance of solution. The sensor reduces limit of detection (LOD) of analyte and improves the sensitivity of the device. The LOD of the potassium chloride solution is 1 nM, an

SUBMITTER: Zhang S 

PROVIDER: S-EPMC9003331 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature