The applicability of phase-sensitive alternating current measurements in flow-through detection

The applicability of phase-sensitive alternating current (a.c.) measurements in flowthrough detection is discussed. The differences between flow and non-flow conditions are examined for copper(II) and thiourea at a horizontal dropping mercury electrode in an “open system”. The possibility of using this detection system in flow-injection procedures is indicated. A glassy-carbon electrode cell is used to test the feasibility of a.c. measurements with hydroquinone as the example.