A filter vial is a device commonly used in laboratories or industries, usually used to separate solid particles or gases from liquids. It is usually made of glass or plastic and has a filter membrane or filter paper that allows liquids to pass through but blocks solid particles or gases. When using a filter vial, pour the liquid that needs to be filtered into the vial and then filter it into another container using appropriate filter paper or membrane. After filtration, the solid particles or gas will be left in the filter vial, while the clean liquid will flow into another container through the filter paper or membrane. Filter vials have many uses, including chemical analysis, biological experiments, water treatment, and industrial production. For example, in chemical analysis, filter vials can be used to separate solid particles from a solution for further testing or analysis. In biological experiments, filter vials can be used to remove impurities or bacteria from cell cultures. In water treatment, filter vials can be used to remove suspended solids or microorganisms from water. In industrial production, filter vials can be used to control product quality or production processes. In summary, filter vials are an important laboratory and industrial tool used to separate solid particles or gases from liquids to improve product quality, production efficiency, and accuracy of experimental results.