Syringe filter is separation equipment which can be combined with a injector to filter out the impurities from the sample of chemically turbid solution. Syringe filter generally consists of a plastic housing and a membrane. The body of syringe filter (plastic housing) is usually made of materials such as polypropylene and nylon; the filter membrane may be of PTFE, nylon or other treated products for specific purposes.
Types of Syringe Filter
Here the syringe filter is mainly divided into three series: FILSTAR, WINSTAR and PURSTAR. FILSTAR and PURSTAR are high-end products with transparent color. Among the 3 types, Filstar and Winstar are more commonly applied with active demands. Unlike the Filstar including both sterilization and non-sterilization types, Winstar only supports the non-sterilization syringe filters. Furthermore, Filstar is of high quality and variety, meeting the needs of research specialists; in comparison, Winstar is a low-end product which is suitable for price-sensitive customers.
Use of Syringe Filter
Syringe filters are normally used for chemical experiments. For example, prior to analysis by HPLC, we can remove particles from a sample via syringe filter. HPLC can be easily damaged and blocked by the impurity particles due to the small packing size and high pressure. Thus the sample and solvents need to be pre-filtered to remove particulate contaminants and protect the instrument, and then the syringe filter is going come in handy. Similarly, the syringe filters are also suitable for IC analysis.
Also, syringe filters are frequently used for the on-site manufacture of parenteral drugs and sterile eye drops, in order to remove microbiological contamination.
Syringe filters and syringes are used to filter chemically turbid solution samples. Most commonly used for chemical HPLC-MS / GC-MS analysis of liquid and gas dust removal, sterilization filtration, biological sample preparation, tissue culture media, microbial media, Decontamination filtration of buffer solutions, etc.
Introduction to the use of syringe filters membrane
1. Before inhaling the sample, first suck about 1ml of air into the syringe, which can minimize the liquid residue.
2. Inhale the sample into the syringe, invert the syringe and clear all the residue on the top
3. Connect the needle filter to the syringe and tighten it gently to ensure a good seal
4. Filter the sample in the syringe and inject it into the sample bottle, then follow the steps to maximize the recovery rate.
Remove the filter, draw air into the syringe, reconnect the filter, and push out any remaining samples
Syringe filters membrane precautions
Use a syringe with a volume of less than 10 ml with caution, as such syringe pressure is sufficient to burst the needle filter.
It is best to choose the filter membrane recommended in the operating procedures.
How To Select Syringe Filters?
As a membrane-based device used to provide you with cleaner sample extracts, syringe filters can remove interfering materials, fine particles, and microorganisms from small liquid samples.
Syringe filters can be figured out by two basic parts: the membrane and housing. When you select filters, you should ensure both parts are compatible with your desired application. You can tell syringe filter housings are matched or not by the composition and format, and membranes are matched to end applications or not by composition, filter diameter, and pore size as well.
The two most popular membrane pore sizes for medical applications in the labs are 0.45 μm and 0.2/0.22 μm. 0.45 μm membranes can be used for applications of general filtering and particle removing, and 0.2/0.22 μm membranes can be commonly used for solution sterilization.
Based on your application, Hawach provides disposable syringe filters which are commonly selected for fast and efficient filtration, material purification, or sterilization in the labs.For a wide range of samples and applications, you can always find Hawach’s high-quality sample filtration solutions in a variety of syringe filter sizes, membranes, and housings.