ARP5088B Test Method for the Determination of Total Acidity in Polyol Ester and Diester Gas Turbine Lubricants by Automatic Potentiometric Titration

Revised

07/08/2014

Features
Issuing Committee
Scope
Content
The test method describes the procedure for determination of the total acid number of new and degraded polyol ester and diester based gas turbine lubricants by potentiometric titration technique. The method was validated to cover an acidity range 0.05 to 6.0 mg KOH g-1. The method may also be suitable for the determination of acidities outside of this range and for other classes of lubricant.
Rationale
Content
This document has been modified based on the results of a round robin which took place during 2013. Major modifications include use of combination electrodes and recognizing that the volume of samples available from service or laboratory tests may make using a 20 g sample size impractical for clean oils, thus a 2.5 g sample size may be used if the 20 g sample size cannot be obtained. Precision statements have been updated.
Meta TagsDetails
DOI
https://doi.org/10.4271/ARP5088B
Pages
9
Citation
SAE International Recommended Practice, Test Method for the Determination of Total Acidity in Polyol Ester and Diester Gas Turbine Lubricants by Automatic Potentiometric Titration, SAE Standard ARP5088B, Revised July 2014, Reaffirmed November 2006, Issued January 1998, https://doi.org/10.4271/ARP5088B.
Additional Details
Publisher
Published
Jul 8, 2014
Product Code
ARP5088B
Content Type
Recommended Practice
Status
Revised
Language
English

Revisions