All Turbidity Standard Solutions are Certified Reference Materials, produced and calibrated under CPAchem's quality system that is:
- ISO 9001 certified.
- accredited according to ISO/IEC 17025 - Testing
- accredited according to ISO 17034 - Reference Material Producer
| 1x | Ammonia Buffer pH 10.0 | EUR 68.00 |
| 1x | Turbidity Standard 40 NTU (Formazin) | EUR 79.00 |
| 1x | Sodium hydroxide - concentrate to make 1L 1M (1N)... | EUR 35.00 |
| 3x | Отстъпка за безхартиено копие на Сертификат за анализ | EUR -3.00 |