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Acetic acid for industrial use — Methods of test — Part 7: Determination of dichromate index

Petroleum products — Determination of acid number — Semi-micro colour-indicator titration method

Overview - ISO 7537:1997 (acid number, semi-micro colour‑indicator titration) ISO 7537:1997 specifies a semi‑micro colour‑indicator titration method to determine the acid number of petroleum products…