Types of Pipettes

Question 1

Does not have graduations to the tip. It is a self-draining pipette, but the tip should not be allowed
to touch the vessel while the pipette is draining.

Answer 1

Mohr pipette

Question 2

Has graduation marks to the tip and is generally a blowout pipette.

Answer 2

Serologic pipette

Question 3

Is a pipette with a total holding volume of less than 1 mL; it may be designed as either a Mohr or a serologic pipette.

Answer 3

Micropipette

Question 4

Are used with biologic fluids having a viscosity greater than that of water. They are blowout pipettes, indicated by two etched continuous rings at the top.

Answer 4

Ostwald-Folin pipettes

Question 5

Is designed to dispense or transfer aqueous solutions and is always self-draining. The bulb- like enlargement in the pipette stem easily identifies the volumetric pipette. This type of pipette usually has the greatest degree of accuracy and precision and should be used when diluting standards, calibrators, or quality control material. They should only be used once prior to cleaning.

Answer 5

Volumetric pipette

Question 6

Are designed to dispense one volume without further subdivisions.

Answer 6

Transfer pipettes

Question 7

Pipette with a pipetting capability of less than 1 mL

Answer 7

Micropipette

Question 8

Pipette that dispenses greater than 1 mL

Answer 8

Automatic macropipette

Question 9

May or may not have calibration marks and are used to transfer solutions or biologic fluids without consideration of a specific volume. These pipettes should not be used in any quantitative analytic techniques.

Answer 9

Disposable transfer pipettes

Question 10

Are able to attach multiple pipette tips to a single handle and can then be used to dispense a fixed volume of fluid to multiple wells, such as in delivery to a multiwell microtiter plate.

Answer 10

Multichannel pipettes