Sartolab ® RF | BT vacuum filtration units
Sartolab® RF | BT are convenient vacuum filtration units designed for research purposes. They are expertly designed for the vacuum filtration of small volumes (50 mL to 1 L). As a complete system, the Sartolab® RF includes a receiver flask to the filtration funnel.
Sartolab® BT is a bottle top filter (filtration funnel) without a receiver flask, enabling customers to use their own receiver flasks and/or to expand filtration capacity - depending on the particle load of the filtered liquid - by filling more than one receiver flask. Sartolab® Bottles are available with four volumes (150 mL, 250 mL, 500 mL and 1 L) and are ideal complements to Sartolab® BT, bottle top filters.
Sartolab® Multistation - for parallel filtration of up to 6 samples
Sartolab® Multistation is a stand uniquely designed to hold one to six vacuum filtration units, allowing simultaneous filtration of up to six samples. Easily install your vacuum filtration units in the Multistation for quick and easy filtration without the need for extra connectors and time-consuming stabilization. Sartolab® Multistation works with Sartolab® RF|BT vacuum filtration units for filtration of 50 mL to 1 L samples.
Faq about vacuum filtration
In vacuum filtration, a vacuum is created by evacuating air from a receiver flask, inducing suction of the liquid through the membrane (performing the filtration). Vacuum filtration is faster than gravity filtration as the solution is forced to go through the filter by the application of vacuum pressure.
Strong vacuum pressure decreases the boiling point of the filtered liquid. You can bring water to boil at lower temperatures under vacuum:
- 100°C @ normal air pressure
- ~70°C @ 500 mbar vacuum
- ~40°C @ 700 mbar vacuum
When filtering hot liquids, the vacuum must be weaker than when filtering room temperate or lukewarm liquids.
In addition to the vacuum filtration unit and the sample to be filtered, you need a vacuum source and tubing to perform filtration.
The vacuum source can be generated with a pump. If the pump cannot forward liquids, it can be damaged if liquids enter the pump. Therefore, it is recommended to use a water trap and suction flask.
You can filter samples > 1 by using several filtration units or several bottles for one bottle-top filter. You can either use Sartolab bottles that are sold separately or glass bottles certified for vacuum filtration.
Glass is brittle. Therefore, it is mandatory to use only glass bottles that are certified for use with vacuum filtration units. It is safer to use plastic bottles like the Sartolab bottles made of polystyrene.
