Research Article
Determination of Total Selenium in Infant Formulas: Comparison of the Performance of FIA and MCFA Flow Systems
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 |
|
|