Integrated pulsed amperometric detection IPAD was applied for the detection of organic compounds for flow
injection analysis. The pulse waveform used in the integrated pulsed amperometry consisted of three steps: detection
potential, oxidation potential, and adsorption potential. The pulse waveform was applied to the working electrode as
the analyte flowed through the electrochemical cell. Unlike ordinary pulsed amperometry, a faradaic current was
integrated over the duration period of the detection potential in the IPAD. Therefore, the total charge was measured
by integrating the current after the detection potential was applied. The current for the initial 10 ms, after applying
the detection potential, was excluded from the integration due to a large charging current at the initial period.
Compared with pulsed amperometry, integrated pulsed amperometry provides a better signal-to-noise ratio and a
lower detection limit. This method was applied to the quantitative analysis of thiourea as a representative analyte of
organosulfur compounds in a flow injection analysis
Integrated pulsed amperometric detection IPAD was applied for the detection of organic compounds for flow
injection analysis. The pulse waveform used in the integrated pulsed amperometry consisted of three steps: detection
potential, oxidation potential, and adsorption potential. The pulse waveform was applied to the working electrode as
the analyte flowed through the electrochemical cell. Unlike ordinary pulsed amperometry, a faradaic current was
integrated over the duration period of the detection potential in the IPAD. Therefore, the total charge was measured
by integrating the current after the detection potential was applied. The current for the initial 10 ms, after applying
the detection potential, was excluded from the integration due to a large charging current at the initial period.
Compared with pulsed amperometry, integrated pulsed amperometry provides a better signal-to-noise ratio and a
lower detection limit. This method was applied to the quantitative analysis of thiourea as a representative analyte of
organosulfur compounds in a flow injection analysis
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