ISO/IEC 17025 and ISO 17034 Acid Number (AN) / Total Acid Number (TAN) Certified Reference Material (CRM) intended to be used for verification of measuring equipment, method validation, method verification, or other quality control processes applicable for the test method ASTM D664, or test methods IP 177, ISO 6619, or other applicable methods.

ARO's Acid Number (AN) / Total Acid Number (TAN) Certified Reference Material has been characterised in accordance with ASTM D664, Method A. Manufacture and characterisation has been performed in accordance with ARO's accreditation to ISO/IEC 17025 and ISO 17034, UKAS CAB No. 27393.

ARO's Acid Number (AN) / Total Acid Number (TAN) Certified Reference Material has been characterised in accordance with ASTM D664, Method A. Manufacturing, testing and certification has been performed in accordance with ARO's accreditation to ISO/IEC 17025 and ISO 17034, UKAS CAB No. 27393.

• • Manufactured and Characterised in strict accordance to ISO/IEC 17025 and ISO 17034
• • Highest level of accreditation guarantee, providing the most credible certified data available worldwide
• • Typically used in, but not limited to, the analysis of used oils and lubricants
• • Acid Number (AN) certified reference materials are characterised in strict accordance with ASTM D664
• • Fully traceable to international standards
• • Supplied in tamper-evident glass packaging, providing assurance of sample integrity
• • Available as a single or triple pack
• • Manufactured in the United Kingdom by ARO Scientific Ltd
• • 24 month shelf life