The packaging has a loose cover (20), which is provided for hydrophilic surface (18) and/or adsorbing surface within the packaging, whose affinity for polar gases is equally large, or larger than that of the hydrophilic surface. The adsorbing surface is provided in the form of adsorber element, which is packed with a micro sampler (12). The adsorber element is provided with a hydrophilic coating, whose hydrophilicity is equal or larger than the hydrophilicity of the surface.