Preparation of Ph. Eur. Reference Color Solutions (Volumetric Preparation)
| Reference color solution | Volume (mL) | R | B | BY | Y | GY |
|---|---|---|---|---|---|---|
| 1 | Standard | 20 | 15 | 20 | 20 | 5 |
| 1% HCl | 0 | 5 | 0 | 0 | 15 | |
| 2 | Standard | 15 | 10 | 15 | 15 | 3 |
| 1%HCl | 5 | 10 | 5 | 5 | 17 | |
| 3 | Standard | 10 | 7.5 | 10 | 10 | 1.7 |
| 1% HCl | 10 | 12.5 | 10 | 10 | 18.3 | |
| 4 | Standard | 7.5 | 5 | 5 | 5 | 1 |
| 1% HCl | 12.5 | 15 | 15 | 15 | 19 | |
| 5 | Standard | 5 | 2.5 | 2.5 | 2.5 | 0.6 |
| 1% HCl | 15 | 17.5 | 17.5 | 17.5 | 19.4 | |
| 6 | Standard | 2.5 | 1 | 1 | 1 | 0.3 |
| 1% HCl | 17.5 | 19 | 19 | 19 | 19.7 | |
| 7 | Standard | 1 | 0.5 | 0.5 | 0.5 | 0.15 |
| 1% HCl | 19 | 19.5 | 19.5 | 19.5 | 19.85 | |
| 8 | Standard | 0.3 | ||||
| 1% HCl | 19.7 | |||||
| 9 | Standard | 0.2 | ||||
| 1% HCl | 19.8 |