Roughing filtration of industrial solvent.Īll Rocker’ vacuuming pumps are oil-mist-free and maintenance-free.Clarification of cell culture media and buffers.Aqueous solution filtration, such as suspended solids, microorganisms, etc.Read more: Rocker Vacuum Filter Holders (Appendix 3) For more information, please refer to chemical compatibility chart. Material of filter holder and receiver flasks should be selected according to chemical characteristics of sample solvent(s).The larger the volume of sample, the larger size holder is suggested. Common size of filter holder includes 25 mm, 47 mm and 90 mm (in diameter). Filter holders are to be chosen based on the volume of sample.How to select proper filter holders and receiver flasks? They’re sometimes connected with a safety trap with silicone tubes. Receiver flasks are the containers connected to vacuum pump and collect filtrate, also known as suction flask or waste flask. Filter holders can be fixed on top of receiver bottles with silicone stoppers or spin lock mechanism. How do you protect pumps from liquid damage? Prote™ Filter Cartridge (YouTube video link)įilter holders hold filter membranes and ensure liquid to pass through the membrane for filtration. A safety trap in laboratory filtration system can be a GL45 glass storage bottle, vacuum bottle or waste bottle. Use of a safety trap is to prevent filtrate from flowing back into the pump due to improper operation, which may cause damage to the pump. The safety trap is usually installed between the pump and the receiver bottle in a vacuum filtration system. Read more: Chart – Rocker Laboratory Filtration Pumps (Appendix I) Rocker 300 Vacuum Pump fits most laboratory experiments with Max. More environmental friendly for not needing additional water. Stable vacuum degree and decompression efficiency under different temperature.Reasons to choose Rocker Oil-free Vacuum Pumps rather than general water pumps: The larger the filter bottle is, the higher flow rate is required. Choose proper pump flow capacity based on the volume of the filter bottle.Having problems with vacuum conversion? Lean how to do correct vacuum conversion. Generally, more viscous or more impurity samples needs higher vacuum to obtain satisfactory results. Choose proper vacuum according to the state of the sample, such as the amount of suspended particles, the viscosity of the liquid, etc.Watch to learn how to choose a right pump for your lab. Select type of the pump by defining the sample whether it’s general water solution, organic solvent, or corrosive.Only few experiments may require pumps with higher vacuum. Generally, a pump with vacuum of 685 mmHg is capable of performing most filtration experiments because 685 mmHg represents a pressure difference of 90%. The vacuum pump used in vacuum filtration is to extract the gas molecules in a specific space (usually a lab flask or bottle) to reach a certain pressure difference and accelerate filtration. Vacuum filtration setup often includes vacuum pump, safety trap, filter holder and receiver flask. Vacuum filtration is to create negative pressure in the container underneath the membrane and accelerate liquid to pass through the membrane to separate solid from liquid. Vacuum filtration is also known as negative pressure filtration, reduced pressure filtration or suction filtration. Appropriate filtration method is to be selected according to the characteristics of the filtration sample, the removal efficiency of suspended particles, and the time spent on filtration. There are 3 common methods of laboratory filtration: by gravity, by vacuum and by pressure. Vacuum Filtration Setup: Vacuum Pump, Safety Trap, Filter Holder, Receiver Bottleįiltration is to block suspended particles in liquid with membrane filters or porous materials, thereby separating solid and liquid substances in a heterogeneous mixture to perform separation and clarification.
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