TOTAL ACID NUMBER (TAN)
Our ISO 17025 and ISO 17034 Total Acid Number (TAN) Standards are ideal for verifying analytical instruments which are used to determine acid number by potentiometric titration.
Acid number – The quantity of base, expressed in milligrams of potassium hydroxide per gram of sample, required to titrate a sample in the solvent from its initial meter reading to a meter reading corresponding to a freshly prepared aqueous basic buffer solution or a well-defined inflection point as specified in the test method.
ISO/IEC 17025 and ISO 17034 Acid Number (AN) / Total Acid Number (TAN) Materials are used for the verification of measuring equipment, method validation, method verification, and other quality control processes applicable for the test method ASTM D664, or test methods IP 177, ISO 6619.
TAN001 – Acid Number Standard Certified Value 0.1 mg KOH/g, 125 g
TAN001/3 – Acid Number Standard Certified Value 0.1 mg KOH/g, 3 x 125 g
TAN020 – Acid Number Standard Certified Value 2.0 mg KOH/g, 50g
TAN020/3 – Acid Number Standard Certified Value 2.0 mg KOH/g, 3x50g
TAN100 – Acid Number Standard Certified Value 10.14 mg KOH/g, 50g
TAN100/3 – Acid Number Standard Certified Value 10.14 mg KOH/g, 3 x 50g
TAN005 – Acid Number Standard Certified Value 0.5 mg KOH/g, 125g
TAN005/3 – Acid Number Standard Certified Value 0.5 mg KOH/g, 3 x 125g
TAN025 – Acid Number Standard Certified Value 2.5 mg KOH/g, 50g
TAN025/3 – Acid Number Standard Certified Value 2.5 mg KOH/g, 3 x 50g
TAN010 – Acid Number Standard Certified Value 1.0 mg KOH/g, 125g
TAN010/3 – Acid Number Standard Certified Value 1.0 mg KOH/g, 3 x 125g
TAN030 – Acid Number Standard Certified Value 3.0 mg KOH/g, 50g
TAN030/3 – Acid Number Standard Certified Value 3.0 mg KOH/g, 3 x 50g
TAN015 – Acid Number Standard Certified Value 1.5 mg KOH/g, 125g
TAN015/3 – Acid Number Standard Certified Value 1.5 mg KOH/g, 3 x 125g
TAN050 – Acid Number Standard Certified Value 4.57 mg KOH/g, 50g
TAN050/3 – Acid Number Standard Certified Value 4.57 mg KOH/g, 3 x 50g
Important as a confirmatory test in quality control testing of new lubricants, it can also be used for condition monitoring of in use or used lubricants. The TAN indicates the age of a lubricant, assisting on the timing of oil changes. They can be used for Lubricants, Condition Monitoring, Crude Oil and Biodiesel.
New and used petroleum products are measured to confirm the Acid Number of the product under test. The Acid Number is an important quality control test for new and used products. The product under test may contain acidic constituents that are present as additives or from oxidation, contamination or degradation of products formed during use and service. These acidic constituents may indicate the presence of harmful acidic compounds that can accelerate the degradation of oil and lead to equipment failure.
Consistent monitoring of Acid Numbers can identify potential issues, allowing users to undertake preventative measures to avoid costly breakdowns and preserve machinery lifespan.
This proactive approach helps in optimising maintenance schedules, reducing downtime, and maximizing operational efficiency.
Our Acid Number (AN) and Total Acid Number (TAN) Certified Reference Materials have been characterised in accordance with ASTM D664, Method A. Manufacture and characterisation has been performed in accordance with accreditation to ISO/IEC 17025 and ISO 17034, UKAS CAB No. 27393.