TY - JOUR A1 - Schoknecht, Ute A1 - Wegner, R. A1 - Horn, Wolfgang A1 - Jann, Oliver T1 - Emission of Biocides from Treated Materials N2 - Methods for the determination of biocide emissions from treated materials into water and air were developed and tested in order to support a comparative ecological assessment of biocidal products. Leaching tests, experiments with simulated rain, extraction cleaning of carpets and emission chamber tests were performed with a series of treated materials. The experiments focused on the effect of changes in the procedure as well as characteristics of the specimens and demonstrate the suitability of the proposed methods for biocides of different product types. It was demonstrated that emissions of biocides into water can be compared on the basis of leaching tests in which the emission kinetics of the active ingredients are recorded. However, the water volume per surface area and the timetable for water changes have to be defined in such tests. Functions of flux rates related to time can be well described for inorganic compounds, whereas modelling of the data is more complicated for organic substances. Emission chamber tests using 20-litre and 23-litre glass exsiccators, originally developed to study volatile organic compounds, were successfully adapted for the investigation of the emission of biocides from treated materials which are usually semi volatile organic compounds. However, test parameters and the method of analysis have to be adapted to the substances to be determined. Generally, it was found that the emission curves for the semi volatile organic compounds investigated differ from those of volatile organic compounds. KW - Air KW - Biocidal products KW - Biocides KW - Biocides directive KW - Emission KW - Emission test chambers KW - Environmental exposure assessment KW - Leaching procedure KW - Simulated rain KW - SVOC KW - Test procedures KW - VOC KW - Water KW - Wood preservatives PY - 2003 SN - 0944-1344 SN - 1614-7499 VL - 10 IS - 3 SP - 154 EP - 161 PB - Ecomed Publ. CY - Landsberg AN - OPUS4-5492 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -