Grabner Vapor Pressure

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Correlation Formula for D5191 (Traditional)

1. ASTM 0.965 * Ptot - 0.548 psi
2. EPA 0.956 * Ptot - 0.347 psi

Correlation Formula for D6378 (No Sample Prep)
3. ASTM 1.000 * Ptot - 1.000 * Pgas - 0.15 psi
4. EPA 1.000 * Ptot - 1.000 * Pgas - 0.02 psi