text: The first issue with using concretes in perfumery is that their extracts can become rancid after several months, especially if the containers are exposed to strong light.
  The second issue is regarding residual pesticides in concretes. Cultivation of natural raw materials for producing concretes is often done by using monoculture techniques that use pesticides. The international regulation of pesticides in use for natural raw materials is not consistent yet. In Europe, the Regulation no. 396/2005/CE and Regulation n° 1107/2009 of the European Parliament and the European Council set target maximum pesticide residue limit as 0.01 mg kg. However, currently, there is no universal method for analyzing the amount of residual pesticides in concretes that could show if the amount of residual pesticide in a concrete sample is safe. Previous analyses that used gas chromatography were heavily affected by the different components of the complex mixture of concrete samples. Therefore, it is likely that their analyses of the amount of pesticide in concrete was inaccurate. This is a concern, as a level of pesticide in concrete that is above the safe limit could lead to health risks.