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A comparison of vapour pressure measurements of quinizarin and leuco ‐quinizarin via transpiration and thermogravimetry
Author(s) -
Hinks D,
Rafiq M I,
Price D M,
Montero G A,
Smith B
Publication year - 2003
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2003.tb00155.x
Subject(s) - thermogravimetry , knudsen number , transpiration , vapor pressure , chemistry , effusion , analytical chemistry (journal) , thermodynamics , environmental chemistry , inorganic chemistry , organic chemistry , physics , biochemistry , photosynthesis
The vapour pressure of solids can be obtained using a number of methods, including the Knudsen effusion method, the Knudsen torque‐effusion method and a transpiration method. Each method has benefits and disadvantages. Reported is a comparison of vapour pressure data for two compounds, quinizarin and leuco ‐quinizarin, using a transpiration method and a recently developed method based on thermogravimetry. Thermogravimetry provided vapour pressure–temperature dependence data for each compound with expediency and in agreement with the transpiration method.