Applications and Features of Syringe Filters

Syringe filter are filters for standard lab samples, providing a fast, convenient and reliable way to filter samples. It is widely used in colloid separation, microanalysis, gravimetric analysis, and aseptic test. Syringe filter handle chromatographic samples without introducing other impurities into the process. The material of the membrane and shell structure is very important. Because of the precision of the chromatographic system and the accuracy of the result analysis, it is very important to filter the samples.

Syringe filters are mainly used for filtering mobile phase and sample in chromatographic analysis. Impurities in samples and solvents can not only damage chromatographic instruments and columns, but also greatly affect the analytical results. Thus, syringe filters can protect the column and the chromatographic system from contamination and improve the sensitivity and accuracy of analytical results.
Syringe filters are widely used in drug analysis, food testing, environmental monitoring, protein removal, and sterility testing.
The nylon membrane of a syringe filter is suitable for the filtration of aqueous and organic solvents, such as the sample preparation of liquid and gas chromatography. It is characterized by high flux, low solubility, and good mechanical strength. The good physical properties of nylon can meet the demand for demanding test conditions.

Features of a syringe filter

1. Relatively uniform aperture;
2. High porosity;
3. No media shedding;
4. Thin texture and low resistance;
5. Fast filtration and minimal adsorption;
6. Low cost.
7. The filter casing is made of sanitary polypropylene material.
8. The structure of the filter casing is precise and the design is reasonable, ensuring smooth filtering.
9. Adopt filter membrane, with fast flow rate and stronger pressure resistance, which is not easy to break.
10. The built-in filter membrane has uniform pore diameter, high porosity, high filtration accuracy, and very low residual rate, which reduces sample waste.
11. The interface connection is tighter and more convenient to use.

Highlights of HAWACH syringe filters

1. The filter housing material is made of sanitary polypropylene.
2. Precise structure design, which ensures smooth filtration, rationalized internal space, and low residual rate, thereby reducing sample waste.
3. With a thread on the edge part to play a non-slip effect. The humanized design makes the operators do things with facility.
4. The high quality filter membrane with a membrane pore size that protects your instrument and column.
5. Syringe filters have stable membrane quality and zero difference between batches, ensuring consistency of analysis results.
6. Clear specification markings, eliminating confusion.
7. With lock to prevent the filter from flying out due to excessive pressure.

The shell of a syringe filter

1. High-pressure polypropylene (PP);
2. No leakage;
3. Save the tedious and time-consuming preparation work;
4. High-temperature resistance.

Syringe filters are fast, convenient, and reliable filtering tools routinely used in laboratories. They are beautiful in appearance, light in weight, and high in cleanliness. They are mainly used for sample prefiltration, clarification of particles, liquids and gases.

Hawach syringe filters are used to prevent chromatographic samples from introducing other impurities during the filtration process. The appearance of such impurities may be the particulate matters peeling off from shell or the filter membrane and brought into the filtrate. Therefore, the membrane material and shell structure are important. Different types of membranes are suitable for samples with different properties.

Application of syringe filters

1. Sample prefiltration;
2. Clarifying and removing particles;
3. Liquid and gas filtration.
4. Educational and commercial research and development laboratory filtration of aqueous and organic phase solutions; teaching, quality inspection, quality control; chromatography, mass spectrometry sample preparation.
5. Ambient air, exhaust air, and water quality analysis.
6. Analysis of raw materials, finished products and semi-finished products of food, beverages and drugs.
7. Drug testing, medical research, life science research.
8. Microelectronic semiconductor, chemical industry, cement / mineral analysis, etc. Common syringe filters include edge filters and ultrasonic filters:

An edge filter: the disadvantage of the traditional filter is easy blasting. An edge filter is suitable for ventilation, gas purification, gas sterilization, and water resistance.

An ultrasonic filter: it adopts new ultrasonic welding technology and new double-layer membrane design, which can filter large particles in advance, especially suitable for filtering large particles and multi-impurity materials.

Factors to consider when choosing a syringe filter

1. Hydrophilic samples: The use of hydrophilic membranes has an affinity for water and is suitable for filtering water-based solutions. Available filter membranes are: mixed cellulose esters, polyethersulfone (PES) Nylon, and the like.
2. Strongly corrosive organic solvents: Generally, hydrophobic membranes such as PTFE, polypropylene (PP) and other filter membranes are used.
3. Protein solution: Choose a filter with low protein adsorption, such as a PVDF filter.
4. Ion chromatography: PES membranes are generally considered to be more suitable for the filtration of solutions with low inorganic ions.

When selecting a syringe filter, in addition to the above factors, the volume of the sample must be considered. Usually, when the sample size is less than 2ml, a 4mm diameter micro filter is used; for a sample size between 2-10ml, a 13mm diameter syringe filter; when the sample volume is greater than 10ml, a 25mm diameter syringe filter is used.

Syringe filter have different filter membranes (PTFE, PES, nylon 6, nylon 66 and PVDF) selection and each filter membrane has different apertures. Hawach provides PVDF Syringe Filter, PP Syringe Filter, Cellulose Acetate Syringe Filter, Hydrophilic PTFE Syringe FilterPES Syringe Filterand other syringe filter for your choice.