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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.43  No.11 (2002)  >  pp.2903-2907

MATERIALS TRANSACTIONS
<<Previous article Vol.43  No.11 (2002)   pp.2903 - 2907 Next article>>

Vapour Pressure Determination for Dibenzo-p-dioxin, Dibenzofuran, Octachlorodibenzo-p-dioxin and Octachlorodibenzofuran Using a Knudsen Effusion Method

Xian-Wei Li1), Etsuro Shibata1), Eiki Kasai1) and Takashi Nakamura1)
1) Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University

A new apparatus with Knudsen effusion method especially designed for the vapour pressure measurements of dioxin congeners and other POPs is described. Crystalline benzoic acid and anthracene were first used to test the new designed apparatus. The vapour pressure and enthalpy results of the two reference compounds were found in good agreement with accepted literature data. The vapour pressure and enthalpy results of crystalline DD, DF, OCDD and OCDF determined with the new apparatus are presented, and compared with the literature data measured with other methods.


Keyword:
vapour pressure, Knudsen effusion method, enthalpy of sublimation, entropy of sublimation, benzoic acid, anthracene, dibenzo-p-dioxin (DD), dibenzofuran (DF), octachlorodibenzo-p-dioxin (OCDD), octachlorodibenzofuran (OCDF), Polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs)

Received: August 08, 2002
Accepted: September 18, 2002 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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