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Stealth compounds in indoor air

The hypothesis is that organic emissions indoors and oxidants from the outside form products with unknown irritating or poisonous properties. The organic compounds come e.g. from building materials and consumer products while ozone is the primary oxidant in ventilation air. Few such products have been documented because unsuitable analysis methods were used.

We have made a list of volatile "indoor" compounds used in large amounts. Then the literature and knowledge about air chemistry was used to estimate reaction rates and products. Experiments will be made in important cases with no knowledge. Measurements in realistic indoor environments e.g. a primary school and a multi-storey “passive house” have been be made to demonstrate their presence. The products have properties such that derivatisation is necessary to detect them. At present we are looking at products from the reaction between squalene from human skin and ozone. The products list may facilitate studies of health effects and indoor air. Estimates of concentration-time profiles e.g. to judge exposures are complicated by ventilation. A low ventilation rate will give high emission- and product concentrations but limit the oxidant input. A simple model will therefore be put together to allow optimal conditions to be found with respect to ventilation rates and concentrations.

Staff within this project

  • Andreas Fischer
  • Evert Ljungström
  • Sarka Langer


Page Manager: Katleen Burm|Last update: 1/3/2012

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Utskriftsdatum: 2019-07-16