Preparation of Ph. Eur. Reference Color Solutions (Gravimetric Preparation)
| Reference color solution | Weight (g) | R | B | BY | Y | GY |
|---|---|---|---|---|---|---|
| 1 | Standard | 20.2420 | 15.4215 | 20.2760 | 20.2240 | 5.1325 |
| 1% HCl | 0.0000 | 5.0215 | 0.0000 | 0.0000 | 15.0645 | |
| 2 | Standard | 15.1815 | 10.2810 | 15.2070 | 15.1680 | 3.0795 |
| 1%HCl | 5.0215 | 10.0430 | 5.0215 | 5.0215 | 17.0731 | |
| 3 | Standard | 10.1210 | 7.7108 | 10.1380 | 10.1120 | 1.7451 |
| 1% HCl | 10.0430 | 12.5538 | 10.0430 | 10.0430 | 18.3787 | |
| 4 | Standard | 7.5908 | 5.1405 | 5.0690 | 5.0560 | 1.0265 |
| 1% HCl | 12.5538 | 15.0645 | 15.0645 | 15.0645 | 19.0817 | |
| 5 | Standard | 5.0605 | 2.5703 | 2.5345 | 2.5280 | 0.6159 |
| 1% HCl | 15.0645 | 17.5753 | 17.5753 | 17.5753 | 19.4834 | |
| 6 | Standard | 2.5303 | 1.0281 | 1.0138 | 1.0112 | 0.3080 |
| 1% HCl | 17.5753 | 19.0817 | 19.0817 | 19.0817 | 19.7847 | |
| 7 | Standard | 1.0121 | 0.5141 | 0.5069 | 0.5056 | 0.1540 |
| 1% HCl | 19.0817 | 19.5839 | 19.5839 | 19.5839 | 19.9354 | |
| 8 | Standard | – | 0.3084 | – | – | – |
| 1% HCl | – | 19.7847 | – | – | – | |
| 9 | Standard | – | 0.2056 | – | – | – |
| 1% HCl | – | 19.8851 | – | – | – |