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Measurements of saturation vapour pressure for estimating biocide concentrations in indoor air

: Salthammer, T.; Uhde, E.; Müller, M.G.; Cammenga, H.K.

Tham, K.W. ; National University of Singapore; International Society of Indoor Air Quality and Climate -ISIAQ-, Ottawa:
7th International Conference on Healthy Buildings 2003. Proceedings. Vol.1 : 7th - 11th December 2003, Department of Building, National University of Singapore
Singapore, 2003
ISBN: 981-04-9974-4
Healthy Buildings Conference <7, 2003, Singapore>
Conference Paper
Fraunhofer WKI ()
biocides; vapour pressure; emission; indoor air quality; test chamber

The vapour pressure is an important parameter for estimating the fate of chemicals in the indoor environment. For compounds of low volatility, a combination of the Knudsen effusion method and the Langmuir free evaporation method enables the precise measurement of vapour pressures over a wide temperature range. This is demonstrated for the compounds dichlofluanid, tolylfluanid and alpha-endosulfan. Saturation concentrations were estimated and compared with results from test chamber experiments carried out under indoor conditons.