Photometric determination of free chlorine, total chlorine and ozone with N,N-diethyl-1,4-phenylene diamine (DPD)/potassium iodide Free chlorine, total chlorine and ozone react with DPD (N,N-diethyl-1,4-phenylene diamine) to form a red-violet dye. By defined addition of iodide ions one can differentiate between the individual components.
- Reference Code: 985017
- Type: 0.05 - 2.5 mg/L Cl2 | 0.05 - 2.0 mg/L O3
- Sufficient for: 20 determinations
- Shelf life: at least 1 year
- Sea water suitability: yes