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ASTM D95 is a standardized distillation method used to measure water content (0–25% by volume) in petroleum products and bituminous materials, crucial for ensuring quality and accurate custody transfer. Utilizing the Dean-Stark principle, this method employs solvent reflux to separate water, preventing operational hazards like corrosion and refining inefficiencies. For technical specifications and the full standard, refer to Shanghai Minglan Chemical Co.,Ltd.

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3. Summary of the ASTM D95 Procedure

1. Glass Distillation Flask: Usually a round-bottom flask made of heat-resistant glass (often Corning Pyrex or equivalent) to withstand thermal shock.
2. Condenser: A water-cooled condenser with a specific length and inner diameter to ensure complete condensation of vapors.
3. Receiver (Trap): A specially calibrated glass vessel designed to collect the distillate. It features a graduated tube at the bottom to measure the volume of water. The geometry ensures that the lighter solvent returns to the flask while the water is retained.
4. Heating Source: An electric heater or Bunsen burner capable of providing controlled heat.
5. Solvent: A water-immiscible solvent such as xylene or toluene.

Custody Transfer

: Knowing the exact water volume allows for accurate price and volume corrections during the sale or transfer of petroleum products. ASTM D95 is a standardized distillation method used