Umweltsituation im Grünen Gewölbe Dresden: Charakterisierung mit Hilfe von Glassensoren

Pollution in the exhibition rooms and display cases of museums can be detected with the aid of glass sensors by exposing chemically sensitive sample glass for 3 to 13 months at certain measuring sites to the prevailing climate. The increase in the absorption bands of the hydroxyl groups due to the glass corrosion reactions can be measured with the aid of infrared spectroscopy. The results obtained at the 48 measuring sites in the display cases and rooms of the Green Vault distinctly demonstrated that closed display cases with little ventilation have far worse values. In other words, there is greater corrosion in the display case than in air-conditioned rooms. Consequently, display cases need to be constructed in such a way that the air is exchanged. Only then, will enamel objects be at less risk. The source of pollution are emissions from diverse materials. However, an exchange of air does not always reduce pollution. In the Great Mogul display case, there is, among other things, a historic table with objects arrange on it. As the table is part of the exhibit, it cannot be replaced. However, forced ventilation lowered the high concentration of acetic acid emitted by this table to such an extent that the sensor results (and thus the potential risk to the objects) are acceptable.