ASTM D2878: Vapor Pressure, Apparent

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ASTM D2878 Estimating Apparent Vapor Pressures and Molecular Weights of Lubricating Oils

The method utilizes evaporation loss data obtained from ASTM D972 and calculations based upon a standard pure substance (m-terphenyl) to obtain apparent molecular weight and vapor pressure.  Test time and temperature are selected to give an evaporation of 5.0% ± 1%.  This procedure minimizes the effect of low concentrations of low molecular weight material or volatile impurities.  The molecular weight is required for the calculations and can be obtained with an evaporation run at 400°F, but only if 5% can be evaporated in a reasonable length of time.  Alternately, molecular weight obtained from ASTM D2503 or equivalent can be used and may be preferable if oxidation at 400°F is of concern.

Price: $420.00

Sample size: 50 g

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Petro-Lubricant Testing Laboratories, Inc.
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Phone: +1 973-579-3448

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