How to analyze calcium lignosulfonate A. 15 lignin content (β- naphthylamine method ) A. 15.1 Equipment a. Analytical balance ( weighing 200g, a sense of volume 0.1mg); b. Pipette (10ml); c. Water bath ; d. G4 filter bowl . A. 15.2 Reagents a. Hydrochloric acid : 0.3N b. β- naphthylamine hydrochloride solution (C10H7NH2 light HCl): […]