Fuel and Lubricant Testing

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IP 177 - Acid Number (Potentiometric Method)

We perform testing by IP 177 to determine the acidic constituents (acid number) in petroleum products, lubricants, biodiesel and blends of biodiesel. Biodiesel and biodiesel blends (and other petroleum products) may contain acidic constituents that are present as additives or as degradation products formed during service, such as oxidation products. The acid number is a measure of the acidic substance in the fuel sample (as defined under the conditions of the test). The acid number is used as a guide in the quality control of lubricating oil formulations.

We also perform acidity and acid number testing by ASTM D1613ASTM D3242ASTM D3339ASTM D664ASTM D7795ASTM D847ASTM D974IP 139IP 354ISO 6618ISO 6619, and SAE ARP5088. These different test methods use different instruments or procedures or are used for certain sample types. Click on the test method number to learn more about each test.

Contact us today to receive a quote for your petroleum testing.

IP 177 corresponds to ASTM D664.