Many engineering universities and large corporations have site licenses. If you are a student or employee, check your internal library portal.
Yes. The standard allows for bromophenol blue indicator, but this is less accurate for colored or dark samples. The potentiometric (pH meter) method is preferred. astm d2074 pdf
A precisely weighed sample of the dark oil is dissolved in a solvent mixture (typically toluene, isopropyl alcohol, and a small amount of water). Safety: The standard involves handling strong acids (Method
ASTM D2074 is the standard test method for the "Determination of Total Base Number (TBN) of Dark Oils by Potentiometric Hydrochloric Acid Titration." It was developed by ASTM International’s Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants. The official document details specific procedures
While other standards like ASTM D2896 and D4739 are more famous for TBN testing, D2074 serves a specific purpose: analyzing dark-colored oils that obscure visual indicators used in other methods.
The official document details specific procedures. While you need the official PDF for full technical details, here is a high-level summary of the methodologies: