Detection of Total Phenol in Green and Black Teas by Flow Injection System and Unmodified Screen Printed Electrode
Figure 2
Flow diagram used. , sample (standard solutions or samples), and , carrier streams (phosphate buffer solution), , reagent stream (ferricyanide solution), IC, injector, and , sample and reagent loops, , waste, and , coiled reactors, a and b, confluent points, , confluent stream (EDTA solution), FC, flow cell (model FC2), and , waste. The boxed part relates to the movable bar of the commutator, the dashed lines indicating the next commutating state. The sites where pumping is applied are indicated by arrows. For system dimensioning, see text.
