Determination of Total Selenium in Infant Formulas: Comparison of the Performance of FIA and MCFA Flow Systems
Figure 2
Multicommutated flow system. On the left the time sequence. S: sample (7.2 mL min−1), MC: mixing coil (50 cm), PS: phase separator, QC: quartz cell, W: waste, and P: peristaltic pump. V1, V2: solenoid valves. HCl: 5% (v/v): 3.2 mL min−1; NaBH4: 0.5% (w/v) solution in 0.05% (w/v): 1.7 mL min−1. N2: carrier gas (nitrogen), 0.32 L min min−1.
