Titration In a 100 or 150 mL beaker are added 50 ml sample and 2 ml of the Glyoxal solution. After 5 minutes 5 ml of the H2SO4 25 % are added. The mixture is directly titrated with the Iodine solution to an A endpoint. ChemTron Titroline 6000自動電位滴定儀 優(yōu)萊博 TitroLine 7500KF容量法卡式水份滴定儀 優(yōu)萊博 TitroLine 6000自動電位滴定儀