Table II.
Composition and Physicochemical Properties of Acetate Buffer, Blank FeSSIF, Blank FaSSIF, SIFsp, and 0.05 M Phosphate Buffer
| Acetate Buffer | Blank FeSSIF | Blank FaSSIF | SIFsp | 0.05 M Phosphate Buffer | |
|---|---|---|---|---|---|
| Composition | |||||
| KH2PO4 (mM) | – | – | – | 50.0 | 25 |
| Na2HPO4 (mM) | – | – | 28.4 | – | 25 |
| NaOH (mM) | – | 101.0 | 8.7 | 22.4 | – |
| CH3COOH (mM) | 28.0 | 144.1 | – | – | – |
| NaCl (mM) | – | 203.2 | 105.9 | – | – |
| CH3COONa·3H2O (mM) | 36.5 | – | – | – | – |
| Double-distilled water (L) | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| Physicochemical properties | |||||
| pH | 4.5 ± 0.1 | 5.0 ± 0.1 | 6.5 ± 0.1 | 6.8 ± 0.1 | 6.8 ± 0.1 |
| Ionic strength (mol/L) | 0.037 | 0.304 | 0.200 | 0.072 | 0.100 |
| Buffer capacity (M/∆pH) | 0.034 | 0.130 | 0.120 | 0.034 | 0.023 |