ASTM D6304
Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration
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About This Item
ASTM D6304 is the ASTM standard for determining water in petroleum products, lubricating oils, and additives by coulometric Karl Fischer titration. It provides a reliable technical basis for measuring low levels of moisture in liquid materials where water can affect performance, stability, and quality. For laboratories and buyers, this standard supports consistent testing and clearer product evaluation. ASTM D6304 is widely used when accurate moisture measurement is needed for routine control or specification-related decisions.
ASTM D6304 standard overview
The ASTM D6304 standard defines a test method focused on water determination using coulometric Karl Fischer titration. Its purpose is to guide measurement of water content in petroleum products, lubricating oils, and additives in a controlled and repeatable way. Because the method is based on titration, it is commonly selected for low-water analysis where precision matters. The standard serves as a technical reference for laboratories that need a structured approach to moisture testing and reporting.
Where is ASTM D6304 used?
This standard is commonly used in laboratories that test petroleum-based liquids, lubricating oils, and additive packages. It is relevant in quality control workflows, incoming inspection, product development, and compliance testing where water content may influence product behavior. ASTM D6304 may also be used by suppliers, refiners, and independent testing facilities that need a recognized method for comparing results across batches, materials, or specifications.
Practical importance of ASTM D6304
In practice, ASTM D6304 helps organizations measure moisture consistently and support informed product decisions. Water content can affect storage stability, lubrication performance, and additive effectiveness, so a standardized test method is valuable for risk reduction and quality control. The use of a recognized ASTM standard also supports procurement reviews, specification checks, and laboratory-to-laboratory comparability. For many users, it is an important reference for dependable and repeatable water determination.
- Water determination by coulometric Karl Fischer titration
- For petroleum products, lubricating oils, and additives
- Supports laboratory quality control and specification checks
- Useful for low-level moisture measurement workflows
- Publication Date: 2025-07-29
- Publisher: ASTM
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