Descrption of Different Specifications of Filter Bottles and Cleanness for Solvent Filters

Solvent filter is a common device in chemical laboratories. In chromatographic analysis, it plays a vital role in removing impurities that affect the life of the chromatographic column and the detection accuracy of the system. The filter bottle of the solvent filter plays an important role and is used for various filtration experiments in the laboratory, such as the pretreatment of microanalysis samples, the purification of solvents, and the filtration of aqueous solutions. The category is also particular, let’s take a look.

Glass solvent filters(300mL Glass Solvent Filter, 500ml Glass Solvent Filtration Apparatus) are mainly used in liquid chromatography mobile phase filtration, particulate matter analysis, and microbial contamination detection. They are standing equipment in chemical laboratories. It adopts borate glass as the material, which can filter various aqueous solutions, organics, and corrosive liquids in the analysis, and can be autoclaved at 121°C.

The glass solvent filter is designed for fast solvent filtration and degassing. It is suitable for the filtration and degassing of the mobile phase in liquid chromatographic analysis. It has also been widely used in gravimetric analysis, microanalysis, colloid separation, and sterile experiments.

The glass solvent filter consists of a green bottle device and a vacuum pump. The filter bottle includes a 250ml filter cup, a middle filter head, and a lower triangular liquid collecting bottle. It uses a special aluminum alloy clip and is equipped with different filter membranes to ensure convenient and fast use. The vacuum pump is oil-free, beautiful in appearance, and easy to operate. It is simple and convenient, which is especially suitable for laboratory and other occasions.

Different specifications of filter bottles

1. Small filter bottle
Vacuum suction small filter bottle is suitable for microfiltration in various laboratories such as molecular biology. The unique filter funnel configuration is very suitable for laboratory microfiltration experiments. The funnel and the receiving bottle are connected with a silica gel plug, and the packaging is well airtight. It is made of high-quality borosilicate glass with fine workmanship. It can be used with a 25mm diameter microporous filter membrane (the pore size can be selected according to the experimental requirements), which is more suitable for the needs of microfiltration.

2. Suction bottle
Vacuum suction filter bottles can be used for a variety of laboratory vacuum filtration experiments, especially suitable for microbial detection and filtration, with rotary cassette funnel design. The connection between the filter cup and the base of the stainless steel funnel adopts a rotary cassette design, which eliminates the trouble of installing fixtures for traditional filter funnels. It is faster and more convenient to replace the filter membrane with one hand. It installs a hose interface protection device.

The vacuum pump hose interface is equipped with a red protective cap to prevent the interface from breaking due to excessive force when plugging and unplugging the hose. The rapid drainage design can quickly drain waste liquid without disassembling and installing the funnel. The filter funnel is made of 316 stainless steel with better corrosion resistance to ensure the funnel’s durability.

3. Filter bottle with base
This suction filter bottle can be used for a variety of laboratory vacuum filtration experiments, especially suitable for microbial detection and filtration. The spin-on funnel design eliminates the trouble of installing fixtures for traditional filter funnels, and the filter membrane can be replaced with one hand more quickly and conveniently. The vacuum pump hose interface is equipped with a red protective cap to prevent the interface from breaking due to excessive force when plugging and unplugging the hose. The weighted magnetic fixing seat can strengthen the prevention of accidental collision and the dumping of the receiving bottle.

300ml Glass Solvent Filters Supplier 300ml Glass Solvent Filters Packaging vacuum filtration

How to clean the solvent filter?

1. For newly used filter elements, clean water backflushing and gas backflushing are generally used for cleaning, that is, flushing with clean water slightly greater than the working pressure (for example; 0.3mPa) in the opposite direction for cleaning. The recoil time is about 1-3 minutes.

2. For multiple backwashing, when the filtering effect does not rise significantly, you can use a hydrochloric acid solution of less than 5%, or a sulfuric acid solution of less than 8%, or a NaOH solution of less than 10% to soak at room temperature, and then rinse with water.

The specific choice of pickling or alkali cleaning should be based on the fact that the impurities in the filtrate are easily soluble in acid or alkali.

3. Clean after clogging
After a long time of use, the quality or pollution of solvents and the growth of algae will block the solvent filters, thereby affecting the operation of the pump, especially aqueous solutions or phosphate buffers. In order to effectively prevent the clogging of the solvent filter in the solvent bottle, it is necessary to strictly perform solvent filtration during use to avoid exposing the solvent bottle to direct sunlight. Try to use an amber solvent bottle to contain the aqueous solution or phosphate buffer solution. Daily distilled water and phosphate buffer solution should not be used.

If the solvent filter is clogged, or the sieve plate becomes discolored after a long time, what should I do to clean it?

Remove the solvent filter from the street of the pipeline; rinse the remaining mobile phase with pure water; place the filter in 35% concentrated nitric acid for about 1 hour; take it out and clean it with pure water, otherwise, it will damage the chromatographic column;  put the filter back in place.

Remember that the solvent filter cannot be cleaned with an ultrasonic cleaner. The glass particles may shatter and cause blockage. If it is a stainless steel solvent filter, it can be placed in isopropanol for ultrasonic cleaning for about 20 minutes.

Maintenance of solvent filter

The glass solvent filter should also be maintained and maintained in time, and the filter cloth in the gasification device should be checked frequently. Generally, it is checked once every six months and lubricated regularly. Before the operation, add a proper amount of engine oil to the solvent filter to lubricate the oil seals at both ends of the movable solvent filter. A proper amount of oil should be added to the solvent filter before the operation to lubricate Detect the looseness and wear of each component, find and deal with the problem in time, and replace the damaged component in time.

After working for a period of time, the filter element contains a certain amount of impurities. At this time, the pressure drop increases and the flow rate will decrease. Some precision filter elements, such as bag filter elements and polypropylene filter elements, cannot be used repeatedly. When removing impurities, pay special attention to the precision filter element, not to be deformed or damaged, otherwise, if the filter element is installed, the purity of the medium after filtration cannot meet the design requirements. If you have any problems with the use and maintenance, welcome to contact us directly.

How to judge whether the solvent filter is clogged?

The clogging of the filter head will affect the filtration rate and effect. To determine whether the solvent filter is blocked, you can remove the solvent inlet line from the instrument, because the line is full of the mobile phase. If there is no blockage, the mobile phase will flow out freely from the line. On the contrary, no mobile phase will flow out or only a very small amount of outflow.