Specifically, the filtration capacity of a needle filter is related to the size and pore size of its filtration membrane, as well as the overall structure of the filter. Smaller filters may be suitable for handling trace samples, such as small sample filtration in HPLC (high-performance liquid chromatography) or GC (gas chromatography). Larger filters can be used to process larger volumes of liquids, such as routine QC analysis in laboratories or sample pretreatment in environmental testing.

It should be noted that the filtration capacity of needle filters is not infinite, it is limited by the material and pore size of the filtration membrane. When the filtered liquid contains a large number of particles or impurities, the filter membrane may quickly clog, thereby affecting the filtration effect. Therefore, when using a needle filter, it is necessary to choose the appropriate filter size according to the actual situation and regularly replace the filter membrane to ensure the filtration effect.

In addition, it should be noted that needle filters are mainly used for fast, convenient, and reliable filtration of small volume samples. If a large amount of liquid needs to be filtered simultaneously, other types of filters or devices may need to be considered.

The amount of liquid that can be filtered by a needle filter varies depending on the specifications and application scenarios, generally ranging from 0.5ml to 200ml. When selecting and using, it is necessary to consider comprehensively based on actual needs.