Manual pipetting aid

Pipetting aids are devices that allow or facilitate the measurement of amounts of liquid using or instead of glass pipettes in a laboratory.

Depending on the field of application, a wide variety of shapes and materials have emerged for pipetting aids. In addition to rubber polymers, silicone is also often used as a material for pipetting aids due to its very good chemical and mechanical properties.

application

First, the pipetting balloon is placed on the pipette. Everything else can be done with just one hand. Open valve A by squeezing it gently and forcing the air out of the rubber ball. When you close (release) valve A, the restoring force creates a negative pressure with which liquid can be sucked in. The suction takes place by controlled squeezing of the valve S, the liquid discharge by pressing E. If a large volumetric pipette is used, it may be necessary to repeat the entire process to aspirate the entire volume.

Experienced users can also use a pipetting balloon to quickly empty a pipette (for example, to add reagent to a flask as quickly as possible); the pipeneck is fixed with the ring finger in the peleus ball to prevent it from slipping out, valve S is opened with the pressure of the middle finger against the ball of the thumb while pressing the thumb and index finger (or the fingers of the other hand) push the ball.