Astm | D95 Pdf

The water content is calculated as either a volume percentage or a mass percentage, depending on how the initial sample was measured. Volume Percentage Formula:

Apply heat to the flask. Adjust the heat source so that the distillation rate is steady, typically producing 2 to 5 drops of condensate per second from the tip of the condenser. Continue the distillation until no more water accumulates in the trap and the solvent clearing in the trap remains completely clear for at least 5 minutes. The typical distillation time ranges from 30 to 60 minutes. Step 5: Final Reading

: A sample is mixed with a water-immiscible solvent, typically xylene or toluene . Astm D95 Pdf

However, ASTM D95 remains the method of choice when:

ℹ️ Prices and availability are subject to change. Always check the official website for current pricing. The water content is calculated as either a

While similar, crude oils are often tested using the more specific ASTM D4006 or centrifuge methods like ASTM D4007. The Principle of Distillation (Dean-Stark Method)

Depending on the expected concentration of water and the sample type, laboratory technicians may choose alternative standards. Method / Standard Ideal Water Range Best Used For Distillation (Dean-Stark) 0.05% to 25% Crude oil, fuel oil, asphalt, tars, lubricants ASTM D6304 Karl Fischer Titration 10 ppm to 2.5% Ultra-low moisture in turbine oils, hydraulic fluids ASTM D4006 Distillation (Crude Oil specific) 0.005% to 2% Dedicated strictly to crude oil matrices ASTM D1796 Centrifugation (BS&W) 0.05% to 2% Field testing for water and sediment in fuel oils Why choose ASTM D95 over Karl Fischer? Continue the distillation until no more water accumulates

: A sample is heated under reflux with a water-immiscible solvent (like xylene or toluene) that co-distills with the water.