| Method | Best For | Range | Advantages | | :--- | :--- | :--- | :--- | | | Free water and emulsified water | 0.1 – 25% | Direct measurement, no calibration needed | | ASTM D6304 (Karl Fischer) | Dissolved water | 0 – 1% | High accuracy for low water content | | ASTM D4006 | Crude oil only | 0 – 25% | Similar to D95 but specific to crude |
Add an equal volume of the selected solvent (e.g., 100 mL of Xylene) into the flask.
The most authoritative source is the ASTM website. You can purchase the current version (D95-23e1 as of 2025) for approximately for a downloadable PDF. Visit www.astm.org and search for "D95".
The primary principle underlying the ASTM D95 test is the distillation of a sample in the presence of a . Astm D95 Pdf
The test method described in ASTM D95 involves centrifuging a sample of crude oil to separate and quantify the water and sediment present. The process can be summarized in the following steps:
This test method is applied to a broad range of materials, including: Crude oils, fuel oils, and residual fuel oils. Lubricants and lubricating oils. Distillate fuels. Bituminous materials, tars, and asphalts. Why is Water Determination Crucial?
While ASTM D95 is robust for high water levels, other standards are used for different needs: | Method | Best For | Range |
Ensure the sample is completely homogenous. Thoroughly mix the liquid petroleum or heat viscous bituminous materials until fluid before taking a representative aliquot. Measure a precise volume or mass of the sample (usually 100 mL or 100 g) and transfer it into the distillation flask. Step 2: Solvent Addition
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Searching for is the first step toward mastering water determination in petroleum products. However, nothing replaces the official document. The PDF contains critical details omitted in summaries, such as: Visit www
The solvent distills over, carrying the water from the sample along with it as a vapor mixture.
As of 2025, the active standard is D95-23e1 . Always check the ASTM website for the most recent revision.
Q: What are the applications of ASTM D95? A: The test method has applications in crude oil quality control, pipeline and transportation monitoring, storage tank monitoring, and regulatory compliance.
Purchase and download the most recent version directly from the ASTM standard store.