ISO 20764:2003

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Petroleum and related products — Preparation of a test portion of high-boiling liquids for the determination of water content — Nitrogen purge method

ISO 20764:2003 is an International Organization for Standardization (ISO) standard that specifies a method for preparing test portions of high-boiling petroleum products, like lubricating oils, to accurately measure their water content using a nitrogen purge technique; essentially, it outlines a procedure to extract a representative sample from a high-boiling liquid to analyze its water content using a standard Karl Fischer method