| Cat. No. | Volume ml | Description | PK | |
|---|---|---|---|---|
| 4683835 | 10 | Reference standard 0.5 / 10 / 1000 NTU | 3 | |
| 4683836 | 100 | Reference standard 500 µg/l PTSA, deionised water | 2 |
| Cat. No. | Volume ml | Description | PK | |
|---|---|---|---|---|
| 4683835 | 10 | Reference standard 0.5 / 10 / 1000 NTU | 3 | |
| 4683836 | 100 | Reference standard 500 µg/l PTSA, deionised water | 2 |