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Move the pipette to the receiving vessel and dispense the liquid by gently pressing the pipette knob to the first stop. After about one second, keep on pressing pipette knob to the second stop. This action will completely empty the tip from the liquid. Afterwards withdraw the tip from the liquid and release the pipette to the ready position.
The plunger is again depressed to the first stop, and then to the second stop, or 'blowout', position. This action will fully evacuate the tip and dispense the liquid. In an adjustable pipette, the volume of liquid contained in the tip is variable; it can be changed via a dial or other mechanism, depending on the model.
Move the pipette to the receiving vessel and dispense the liquid by gently pressing the pipette knob to the first stop (#3). Withdraw the tip from the liquid. Some liquid will remain inside the tip. The liquid remaining in the tip can be dispensed back into the original solution (#4) or thrown away. Release the pipette thumb to the ready ...
Steps for operating a positive displacement pipette [15] Set the pipetting volume. Attach a CP tip onto the pipette. Hold the pipette vertically and press the plunger to the first stop. Put the CP tip into the sample and slowly release it, moving the button to the home position. Press the plunger to the first stop again to dispense the sample.
Pipettes come in several designs for various purposes with differing levels of accuracy and precision, from single piece glass pipettes to more complex adjustable or electronic pipettes. Many pipette types work by creating a partial vacuum above the liquid-holding chamber and selectively releasing this vacuum to draw up and dispense liquid ...
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Eyring Science Center: Provo, Utah: United States 1950 Great Lakes Science Center: Cleveland, Ohio: United States 1996 Imagination Station: Toledo, Ohio: United States 2009 Jonsson-Rowland Science Center: Troy, New York: United States 1961 Michigan Science Center: Detroit: United States 1970 Modelo Museum of Science and Industry: Toluca: Mexico ...
(These are for Class A pipettes; Class B pipettes are given a tolerance of twice that for the corresponding Class A.) A specialized example of a volumetric pipette is the microfluid pipette (capable of dispensing as little as 10 μL) designed with a circulating liquid tip that generates a self-confining volume in front of its outlet channels. [3]