Vapour pressure
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Author
Contributions
- Organisation for Economic Co-operation and Development - Contributor
Publication
2006 - Organisation for Economic Co-Operation and Development, Paris, France
Language
English
Word Count
4,500 words, Guess
Page Count
18 pages
Physical Format
[electronic resource]
Identifiers
- Open LibraryOL30766354M
- ISBN-139786610607525
- Library of Congress Control Number2009659110
Classifications
- DDC543.01
- LCCQD77
Description
This Test Guideline describes eight methods to measure the vapour pressure. Each one can be applied in different vapour pressure ranges. The vapour pressure (in Pascal) of a substance is defined as the saturation pressure above a solid or liquid substance and is determined at various temperatures (in Kelvin). The methods used are: the dynamic method (Cottrell’s method), the static method, the isoteniscope Method, the effusion method: vapour pressure balance, the effusion method: Knudsen cell, the effusion method: isothermal thermogravimetry, the gas saturation method and the spinning rotor method. The vapour pressure from any of the preceding methods should be determined for at least two temperatures. Three or more are preferred in the range 0 to 50°C, in order to check the linearity of the vapour pressure curve. In case of Effusion methods and Gas saturation method, 120 to 150 °C is recommended for the measuring temperature range instead of 0 to 50°C.
Subjects
Series Statement
- OECD guidelines for the testing of chemicals -- 104
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