Determination of basic constituents in petroleum products by potentiometric titration with perchloric acid in glacial acetic acid. The total base number (TBN) is the quantity of perchloric acid, expressed in terms of equivalent number of milligrams of potassium hydroxide (or alternatively in milli-equivalents of hydroxide per gram), that is required to neutralize all basic constituents present in 1 g of sample when titrated under the prescribed conditions. ChemTron Titroline 6000自動(dòng)電位滴定儀 ChemTron 庫倫法卡氏水份滴定儀 優(yōu)萊博 TitroLine 7500KF容量法卡式水份滴定儀