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Effect of pH on Labeling Efficiency of Timolol Maleate
| pH | Percent of labeling efficiency | Percent of free Tc | Percent of colloids |
|---|---|---|---|
| 5 | 87 ± 0.2 | 12.3 ± 0.3 | 0.7 ± 0.3 |
| 5.5 | 90 ± 0.3 | 8 ± 0.2 | 2 ± 0.13 |
| 6.0 | 97.5 ± 0.1 | 2.0 ± 0.5 | 0.5 ± 0.12 |
| 6.5 | 98.2 ± 0.3 | 0.8 ± 0.12 | 0.2 ± 0.03 |
| 7.0 | 94 ± 0.2 | 5 ± 0.1 | 1 ± 0.3 |
| 7.5 | 90 ± 0.1 | 8 ± 0.3 | 2 ± 0.2 |
All values are expressed as mean ± SD (n = 5)
