About the HAWACH Syringe Filter and Its Classifications

With low adsorption of samples, the syringe filter is suitable for small amount of samples filtration in the laboratory. The filter housing is made of polypropylene, welded by ultrasonic, and does not contain adhesion. So it will not contaminate the sample.

Syringe filters are mainly used to filter mobile phases and samples in chromatographic analysis. If there are impurities in the sample and solvent, it will not only cause damage to the chromatographic instrument and column, but also have a great impact on the analysis results. The syringe filter has a good effect on protecting the chromatographic column and the chromatographic system from contamination, and at the same time can improve the sensitivity and accuracy of the analysis results. It is widely used in drug analysis, food testing, environmental monitoring, protein removal and sterility testing.

HAWACH syringe filter

The syringe filter produced by HAWACH has stable quality and complete product specifications. The outer shell is made of polypropylene (PP) with excellent chemical stability, and it is made of different colors, which is convenient for users to distinguish. At the same time, mark the specification name on the product to avoid confusion. The filter membrane adopts high-performance filter membrane with stable quality and good reproducibility. The standard interface is convenient to connect to various syringes, and it can also be directly connected to the needle of the 7725 valve for direct injection after filtration.

Organic phase/watre phase syringe filter

Organic phase syringe filter

1. Nylon syringe filter

It is widely used in various analysis processes, featuring large flux, low dissolution, and good mechanical strength. It can be used to filter water or organic solvents. Nylon's good physical properties can meet the demanding analysis needs of various test conditions.

2. PVDF syringe filter

The protein binding rate of PVDF syringe filter is far less than that of mixed cellulose (MCE), polytetrafluoroethylene (PTFE) and other filtration membranes. It is especially suitable for the filtration and sterilization of biological samples, with low resistance and fast filtration. It is compatible with a variety of organic solvents, has wide applicability, good oxidation resistance and heat resistance, and is suitable for filtration of most media.

3. PTFE syringe filter

Polytetrafluoroethylene (PTFE) membrane is the most chemically stable filter membrane, used to filter chemically corrosive organic solvents, gases, and strong acid and strong alkaline solutions.

Water phase syringe filter

1. MCE syringe filter

The mixed cellulose ester syringe filter is naturally hydrophilic. It is used for aqueous solvent filtration, particle filtration removal, biochemical analysis filtration (protein retention), and is especially suitable for HPLC aqueous solution sample preparation and solvent filtration.

2. PES syringe filter

PES syringe filter is a filter device specially designed for filtering culture medium, culture solution, serum solution, nutrient solution, growth hormone and other solutions that require special treatment in the experimental air. These filters have passed the certification of bacterial filtration capacity, residual amount, and protein recovery rate. Another application is the filtration of mobile phases and samples in ion chromatography.

In addition to the different materials of filter membranes, the pore size is also an important factor to consider when using a syringe filter in an experiment.

Pore size 0.45μm filter membrane: used for routine sample mobile phase filtration, which can meet general chromatographic requirements. Such as: chromatographic system used for 3μm or larger particle size fillers.

Pore size 0.22μm filter membrane: it can remove very fine particles in the sample and mobile phase. Such as: chromatographic system used for <3μm packing.

Pore size 1-5μm filter membrane: it is often used for turbid solutions that are difficult to handle. It can be pre-filtered with a 1-5μm filter membrane, and then filtered with the corresponding filter membrane.