2.3. Flow procedure
The multi-pumping flow system showed in Fig. 1 was operated according to the switching course in Table 1.
The binary sampling strategy [37] was used for handling sample and reagent solutions.
The acceptor stream was on-line formed by four sampling cycles of reagents R1and R2(steps 1 and 2), mixed at the coil B1and car-ried to the GDU (step 3).