Fig. 5.

Detection of Salmonella enterica serotype Typhimurium using a porous electrode in a flow-through, enzyme-amplified immunoelectrochemical sensor. The current at −340 mV was measured upon exposure of the sensor to various concentrations of Salmonella cells ranging from 10² to 10⁷. Cells were suspended in two different sample volumes with the response of each sample volume indicated (dark gray bars representing 5 mL and light gray bars representing 60 mL). Measurements represent the average values of three independent experiments with error bars indicating the standard error of the mean