Polystyrene Turbidity Standards (Ratio - US EPA)
Turbidity standards of polystyrene particles.
Traceable to NIST and Formazin reference material. NTU related to US EPA.
Non-toxic. No special handling and disposal requirements.
Polystyrene turbidity standard cannot be diluted to obtain a lower value corresponding to the dilution. Dilutions are linear only in the case of Formazin turbidity standards.