What is a dropper pipet used for?

Answer 1

There are many types of pipettes (or pipet), but most are essentially a fancier version of a medicine dropper or eye dropper. They are used in a laboratory to transport and/or measure a specific volume of liquid.

Volumetric pipettes allow the user to measure a volume of solution extremely accurately and then add it so something else. They are commonly used to make laboratory solutions from a base stock as well as prepare solutions for titration. They typically only allow you measure one single volume in a particular size pipette (just like with volumetric flasks). Therefore, they come in many different sizes.

There are other types of pipettes also, such as a Pasteur pipette, which is not used to measure the volume of the liquid. It is essentially a large dropper, which can be used to remove liquid from one container and add it to another.

There are also graduated pipettes, also called a Mohr pipette, which also allow you to measure the volume of the liquid in the pipette, although not as accurately as a volumetric pipette. These use a series of marked lines (as on a graduate cylinder) to indicate the different volumes. These also come in a variety of sizes. These are used much like a burette, in that the volume is found by calculating the difference of the liquid level before and after.

All glass pipettes require the use of some kind of additional suction device, typically a pipette bulb (not the Eppendorf pipette or other similar ones, which have a built-in suction mechanism), which is a rubber bulb which sucks the liquid into the pipette and also allows you to drain the pipette in a controlled fashion. A Beral pipette is a one-piece pipette, usually made from flexible soft plastic (polyethylene) that has a built-in bulb on the end.

See the Related Questions and Web Links to the left for pictures and more information on pipets and other laboratory equipment.

*A piece of laboratory glassware, shaped like a thin tube with a bulge in the middle, that allows better accuracy when measuring certain volumes (hence the range of sizes) e.g. when making solutions or samples for titrations.
Function of a pipette: to deliver small and exact volumes of liquids; extremely useful in chemical laboratories.

Answer 2

In general, pipettes are used to measure and/or transport liquids in a laboratory setting. Dropping pipettes, or droppers, help to introduce liquids to a mixture in very small, though inconsistent, amounts.

Answer 3

To transfer a known liquid volume. Commercial ones are graduated so an approximate volume may be transferred, ones you make by simply heating a glass rod to red heat, then stretching it out and cutting it to size are not graduated and just transfer small amounts in a controlled way.

Answer 4

Droppers are used for adding liquids drop by drop.

Answer 5

use for dispensing drops or qualitative amount of liquids..

Answer 6

A dropper pipet used in a science lab is a useful tool. It is used for picking up and dropping liquids into container.

Answer 7

Pipettes are used to deliver small volumes of liquids; they are glass or plastic tubes, generally nongraduated, with a rubber bulb.