This method describes how to determine the concentration of non-ionic surfactants in wastewater photometrically with a cuvette test.
Wastewater resulting from the industrial production of beer and other foods
Non-ionic surfactants (ethoxylate with 3–20 ether bridges) react with an indicator (TBPE: 3,3´,5,5´-tetrabromophenolphthalein ethyl ester, potassium salt) to form complexes which can be extracted with dichloromethane and are then measured photometrically.
This method describes how to determine the concentration of cationic surfactants in wastewater photometrically with a cuvette test.
Wastewater resulting from the industrial production of beer and other foods
Cationic surfactants react with bromophenol blue to form complexes which can be extracted with chloroform and measured photometrically.
This method describes how to determine the concentration of anionic surfactants in wastewater photometrically with a cuvette test.
Wastewater resulting from the industrial production of beer and other foods
Anionic surfactants react with methylene blue to form complexes which can be extracted with chloroform and measured photometrically.