ASTM E1194-17

1.1 This test method describes procedures for measuring the vapor pressure of pure liquid or solid compounds. No single technique is able to measure vapor pressures from 1 × 10⁻¹¹ to 100 kPa (approximately 10⁻¹⁰ to 760 torr). The subject of this standard is gas saturation which is capable of measuring vapor pressures from 1 × 10^–11 to 1 kPa (approximately 10^–10 to 10 torr). Other methods, such as isoteniscope and differential scanning calorimetry (DSC) are suitable for measuring vapor pressures above 0.1 kPa An isoteniscope (standard) procedure for measuring vapor pressures of liquids from 1 × 10⁻¹ to 100 kPa (approximately 1 to 760 torr) is available in Test Method D2879. A DSC (standard) procedure for measuring vapor pressures from 2 × 10⁻¹ to 100 kPa (approximately 1 to 760 torr) is available in Test Method E1782. A gas-saturation procedure for measuring vapor pressures from 1 × 10⁻¹¹ to 1 kPa (approximately 10⁻¹⁰ to 10 torr) is presented in this test method. All procedures are subjects of U.S. Environmental Protection Agency Test Guidelines.