ISI 41-1e Determination of COD
Return 1. Scope The method is applicable to starch milk and hydrolysates LT 12. Dec. 1966 Rev. LT 16. Dec. 1997 2. Principle Titration with NaOH to pH 8.3. 3. Apparatus 3.1 Burette 3.2 pH meter 3.3 Volumetric flask 50 ml 4. Reagents 4.1 Sodium hydroxide 0.1 N 4.2 Phenolphtalein: 1 g in 1 l ethanol 90% 5. Proce