title: pH-metric determination of acid numbers of petroleum oils without titration.
abstract: A pH-metric method was developed for determination of the acid numbers of oils containing organic and inorganic acids at levels <0.1 mg KOH/g oil. The method is based on rapid and complete extraction of acids from a test portion of oil into a special reagent, and measurement of the conditional pH of the mixture "oil-reagent" by a glass electrode. The method uses nontoxic reagents, is not time and labor consuming, and is cheap and simple enough for automation.
authors.affiliation: The National Physical Laboratory of Israel, Givat Ram, Jerusalem. kuselman@netvision.net.il
authors.forename: I
authors.initials: I
authors.lastname: Kuselman
authors.forename: Y I
authors.initials: YI
authors.lastname: Tur'yan
authors.forename: E
authors.initials: E
authors.lastname: Strochkova
authors.forename: I
authors.initials: I
authors.lastname: Goldfeld
authors.forename: A
authors.initials: A
authors.lastname: Shenhar
mesh_terms: D004566:Electrodes; D005898:Glass; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D010578:Petroleum; D011786:Quality Control; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D007202:Indicators and Reagents; D010578:Petroleum