Fuel and Lubricant Testing

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IP 139 - Acid or Base Number by Color Indicatior Titration

We perform lubricants quality testing by IP 139 to determine the acidic or basic constituents (acid or base number) in petroleum products and lubricants. New and used petroleum products can contain basic or acidic constituents that are present as additives or as degradation products formed during service, such as oxidation products. The relative amount of these materials can be determined by titrating with acids or bases. This number, whether expressed as acid number or base number, is a measure of this amount of acidic or basic substances in the oil, always under the conditions of the test. This number is used as a guide in the quality control of lubricating oil formulations. It is also sometimes used as a measure of lubricant degradation in service. 

We also perform acidity and acid number testing by ASTM D1613ASTM D3242ASTM D3339ASTM D664ASTM D7795ASTM D847ASTM D974IP 177IP 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 lubricants testing.

IP 139 corresponds to ASTM D974 and ISO 6618.