Table 4: Figures of merit: comparison of performance of the FIA and MCFA flow systems.

Parameter FIA system MCFA system Detection limit (LD) (3σ/slope of calibration, ) 0.59 μg L−1 in solution 0.08 μg L−1 in solution Quantification limit (LQ) (10σ/slope of calibration, ) 1.95 μg L−1 in solution 0.27 μg L−1 in solution Linearity (μg · L−1) 2–50 () 0.27–27 () Precision (%) () <10 <10 Sampling frequency (hour−1) 70 160 Sample consumption per determination (mL) 0.5 0.6 Reagent consumption for each determination 0.25 mL HCl* NaBH4: 7.3 mg *concentrated 0.05 mL HCl* NaBH4: 2.5 mg *concentrated