Labplas FILTRA-BAG® Blender Bags are designed to simplify taking an aliquot when working with samples which contain large amounts of residue and/or semi-solid/solid substances. When placing an aliquot onto growth media, it's very important that the volume of the aliquot be accurate and that it be free of solid particles. This prevents pipette blockage as well as uneven plate distribution.
The FILTRA-BAG® was designed for compact samples that need to be liquefied and strained. That is why the bag is made with a polyethylene/nylon outer shell which practically eliminates the possibility of piercing the bag wall during blending. In addition, one of the walls has been given a fully transparent light blue tint to differentiate the individual compartments, therefore simplifying how to identify which side the aliquot should be taken from after blending. Most protocols indicate that the sample be inserted in the blue side, so the aliquot is extracted from the clear side after blending.
The dividing filter membrane has 1840 holes per square inch with a pore size of approximately 330 microns. This pore size has proven to be very effective for the majority of applications and allows for optimal solution and bacterial flow between the FILTRA-BAG® compartments during blending.