TY - CONF A1 - Horn, Wolfgang A1 - Klein, Luise A1 - Bethke, Robert T1 - Determination of uptake rates of VVOCs and carbonyls in indoor air on passive sampling system N2 - The identity and concentration of volatile contaminants are important factors in ensuring a healthy indoor environment. Volatile organic compounds (VOCs) in indoor air can be determined by using passive samplers that are exposed to the air for a well-defined period of time. This sampling method is often used in environmental surveys, e.g. the German Environmental Survey (GerES). Conclusions about indoor air concentrations can be drawn from substance and adsorption material specific uptake rates. For the assessment of indoor air quality, highly volatile organic compounds may also be substantial, but for many of these substances realistic uptake rates and suitable analytical methods are lacking. A small chamber is used to generate gas atmospheres with constant concentrations of the analytes at 23 °C and 50 % relative humidity. For a large number of compounds, a very small flow of pure liquid VVOCs is introduced into the chamber via a syringe pump and mixed with a constant flow of clean and humidified air. A gas mixture from cylinders is also used for this purpose. Carbograph 5TD has already been proven as a suitable sorption material for active sampling for most of VVOCs. With this procedure up to 55 different VVOCs should be tested in this study. Stable concentrations of gas phase atmospheres of the first group of VVOCs (acetone, 2-butanone, methyl acrylate) were produced for exposure of passive samplers. Comparison of different adsorbent materials showed that Carbograph 5TD was the most suitable for passive sampling of these substances, with higher uptake than Carbopack X and Tenax® TA. Very strong adsorbents are not suitable for this experimental design as it adsorbs larger amounts of water. The effective uptake rates were calculated for the first three VVOCs on Carbograph 5TD tubes and an exposure time of 7 days. The same experiment will be performed for all VVOCs and ideally one material should be the best option for all of them. T2 - AIRMON 2025 The 11th International Symposium on Modern Principles of Air Monitoring and Biomonitoring. CY - Loen, Norway DA - 15.06.2025 KW - VVOC KW - Air quality KW - Passive sampling PY - 2025 UR - https://stami.no/en/wp-content/uploads/sites/2/2025/06/Programhefte-Airmon-2025-Juni-10-YTH.pdf AN - OPUS4-63632 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Horn, Wolfgang T1 - VOC-Sampling inside display cases with focus on BEMMA evaluation N2 - Museum display cases aim to protect art and cultural goods not only from theft and vandalism, but also from dirt and dust. An often-heard argument within a call for tender of new display cases is that there should be no emission inside of the display case. This is nearly impossible for new ones especially when they must also fulfill the requirement of an air change rate of less than 0.1 per day. For example, constructions or decorations in exhibition spaces, storage containers in depot rooms, and exhibition display cases release volatile substances that might lead to irreversible changes or, under certain circumstances, damage to the stored or displayed objects. In Germany beneath the well-established Oddy-test also the BEMMA procedure is used to evaluate the construction materials. For larger amounts of display cases control measurements of VOCs at the end of construction or buildup is quite common. However, what is necessary to measure the air inside of display cases. What are the circumstances when the display cases were closed before the test period? Is it possible to organize a clean environment for reliable measurements. How comparable are the resulting VOCs with results from BEMMA test and control measurement at the end. The BEMMA procedure should include a further VOC-test at 60 °C. What are the benefits of this enlargement. Mainly materials that have a high potential to store VOCs inside of the material in combination with a less permeable surface should be evaluated stricter than others. T2 - IAQ 2024 The International Conference on Indoor Air Quality in Heritage and Historic Environments CY - New York, USA DA - 18.11.2024 KW - Emission KW - Air quality KW - Display cases KW - VOC PY - 2024 AN - OPUS4-61967 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -