Tube test for the determination of polyoxy carbonic acides (POC). Precise rapid tests for all kind of water and waste water samples. Time-saving and reliable analysis together with Macherey-Nagel NANOCOLOR photometers. Measuring range: POC - 20–200 mg/L POC AS 2020 , POC - 20–200 mg/L POC HS 2020Manufactured by Macherey-Nagel