Astm D95 — Pdf [updated]
Understanding ASTM D95: The Standard for Water in Petroleum Products
Overview
ASTM D95 is the standard test method for determining water content in petroleum products and bituminous materials using Dean-Stark distillation to measure water concentrations up to 25%. This technique is crucial for quality control in the oil industry, preventing corrosion and ensuring accurate product valuation. For detailed technical specifications, access the ASTM D95 standard from ASTM International 分析测试百科网 ASTM D95-13(2018).pdf Astm D95 Pdf
- Exact tolerances for glassware dimensions.
- Safety warnings regarding hot solvents and flammable materials.
- Precision statements for statistical quality control.
- Annexes covering special cases (e.g., foamy samples).
A:
No. It measures free water and emulsified water. Dissolved water (below the saturation point) is not detected. For that, use Karl Fischer titration. Understanding ASTM D95: The Standard for Water in
- Using the wrong solvent: Technical grade solvents may contain water, skewing results.
- Overheating: Boiling too vigorously can carry over water vapor into the condenser without proper separation.
- Improper cleaning: The receiving tube must be scrupulously dry and clean. Any residue will cause false readings.
- Forgetting to correct for sample temperature: The standard specifies reporting results at 60°F (15.6°C). Volume expansion due to temperature must be corrected.