BS 2690-15 – Methods of testing water used in industry-Free EDTA, total salts of EDTA, polyacrylate and polymethacrylate
Titration method for determination of free EDTA; colorimetric method for total salts; polyacrylate and polymethacrylate are separated as copper complexes which are decomposed and the copper is determined. Primarily for control of water treatment.