Reaction Medium | Volume of thiosulfate (0.01 N) solution, mL. | Recovery, % |
HCl (0.1 M) | 5.4 | 54.0 |
water | 6.4 | 64.0 |
Acetate buffer (pH, 3.6) | 7.1 | 71.0 |
Acetate buffer (pH, 3.8) | 7.9 | 79.0 |
Acetate buffer (pH, 4.0) | 8.2 | 82.0 |
Acetate buffer (pH, 4.2) | 8.4 | 84.0 |
Acetate buffer (pH, 4.4) | 8.7 | 87.0 |
Acetate buffer (pH, 4.6) | 9.1 | 91.0 |
Acetate buffer (pH, 5.0) | 9.7 | 97.0 |
Acetate buffer (pH, 5.2) | 10.0 | 100 |
Acetate buffer (pH, 5.4) | 9.8 | 98.0 |
Acetate buffer (pH, 5.6) | 9.6 | 96.0 |
Acetate buffer (pH, 7.0) | 8.6 | 86.0 |
Acetate buffer (pH, 8.5) | 6.9 | 69.0 |
Acetate buffer (pH, 10.0) | 5.7 | 57.0 |