Total Acid Number (TAN) Standards

Paragon Scientific’s ISO 17025 & ISO 17034 Acid Number (AN) Standards are specifically manufactured for the verification of analytical instruments used to determine acid number by potentiometric titration. Each standard is certified in strict accordance with international test method protocols, ASTM D664 / IP 177. Manufacture and certification is carried out in strict accordance with Paragon Scientific’s dual UKAS accreditations to ISO 17025 & ISO 17034. This dual accreditation allows to ensure the highest level of accreditation guarantee and provides the most credible certified data available worldwide.



Typically used in, but not limited to, the analysis of used oils and lubricants. Supplied in tamper-evident glass packaging, providing assurance of sample integrity