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, n = 10)	0.59 μg L−1 in solution	0.08 μg L−1 in solution
Quantification limit (LQ) (10σ/slope of calibration, n = 10)	1.95 μg L−1 in solution	0.27 μg L−1 in solution
Linearity (μg · L−1)	2–50 (r 2 = 0.999)	0.27–27 (r 2 = 0.999)
Precision s r (%) (n = 5)	<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