pH-metric determination of acid numbers of petroleum oils without titration.
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.
Kuselman
I
I
The National Physical Laboratory of Israel, Givat Ram, Jerusalem. kuselman@netvision.net.il
Tur'yan
Y I
YI
Strochkova
E
E
Goldfeld
I
I
Shenhar
A
A
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
D007202:Indicators and Reagents; D010578:Petroleum