A container for storing dental devices includes a container body adapted to hold the dental devices and a dispensing mechanism configured to dispense one of the dental devices when the dispensing mechanism is triggered. A precursor mixture is provided by mixing at least one material selected from the group consisting of silicates, metal alcolates, aluminates and borates with a solvent. The invention applies, in particular, to the detection and quantitative determination of halogenated gaseous compounds used in the microelectronics field and, more especially, halogenated boron complexes.