Pipette having integrated filtration assembly

A pipette-filtration assembly for attachment to a pipette, comprising:

• a main body connected to the pipette, the main body having a main body mating feature;
• a mount assembly fitting within the main body, the main body and the mount assembly defining a first channel and a second channel, the mount assembly having a mount assembly mating feature for mating engagement with the main body mating feature;
• a first valve associated with the first channel permitting flow in a first direction and substantially hindering flow in a second direction;
• a second valve associated with the second channel permitting flow in the second direction and substantially hindering flow in the first direction, the first valve and the second valve being at least partially defined by the mount assembly;
• and
• a filter configured to filter a fluid sample as the fluid sample flows in (i) only the first direction, (ii) only the second direction, or (iii) both the first direction and the second direction.