What is the purpose of the cotton plug at the top of a serological pipet?
Herein, what is the use of serological pipette?
The serological pipette is a nearly ubiquitous laboratory instrument used for transferring milliliter volumes of liquid. Serological pipettes typically have gradations along their sides for measuring the amount of liquid being aspirated or dispensed.
Subsequently, question is, why is it important to leave a small amount of liquid in your volumetric pipet What does the TD on the pipet mean? The volumetric glass pipettes I use in my line of work have two fill lines marked on them. TD is higher up on the pipette than TC and stands for To Deliver. TC is slightly below the TD mark and stands for To Contain. When filling up to the TD mark, one allows the pipet to drain out without any additional force.
Additionally, how do you determine the volume a serological pipette contains?
A pipette is calibrated with a series of graduation lines to allow the measurement of more than one volume. Measure using the bottom of the concave surface of the liquid in pipette.
A label to indicate the size and measurement graduations of the pipette such as:
- 10 mL in 1/10.
- 5 mL in 1/10.
- 1 mL in 1/100.
What is to contain pipette?
TC or TD abbreviated for “to contain” and “to deliver” respectively. In a 'TC' marked pipette, the contained quantity of the liquid corresponds to the capacity printed on the pipette, While in 'TD' marked pipette, the delivered quantity of liquid corresponds to the capacity printed on the pipette.