title: [Determination of free silicon dioxide in dust and rocks by weight and colorimetric methods].
mesh_terms: D003124:Colorimetry; D004391:Dust; D012822:Silicon Dioxide / Q000032:analysis*; D012987:Soil; D014586:USSR
chemical_list: D004391:Dust; D012987:Soil; D012822:Silicon Dioxide
vernacular_title: Opredelenie svobodnoĭ dvuokisi kremniia v pyli n gornykh porodakh vesovym i kolorimetricheskim sposobom.