Why Pipette Systems Are So Versatile In The Laboratory

One of the most widely used tools in any laboratory is the versatile pipette.This

implement is used for the transfer of liquids or semi-solids from one container to the other, or for the precision measurement of liquids and semi-solids before transference.The precision is vital to nearly all laboratory techniques, just as much as the pipetting techniques themselves.

Pipetting fluids or reagents properly has been one of the most looked at problems of any scientific or medical discipline.In most medical testing procedures, the accuracy of a laboratory test can be the ultimate part of the diagnoses, so the veracity of the pipetting should not be in question.Proper handling of the pipette can mean success or failure in any experiment needing precision fluid transfers.

Pipettes come in a variety of sizes, volumes and materials.Glass pipettes are still used for scientific experimentation, but polypropylene is becoming the material of choice.Plastic pipettes are just as calibrated as the glass pipettes, and they are not susceptible to temperature changes as glass.The plastic pipettes are graduated and marked for better measurement, and there is usually a very well defined meniscus in the fluid being measured out.

Transfer pipettes are the most commonly used pipette in the world.They are usually made of polyethylene, and can come in a variety of bore and volume.These versatile implements can be graduated for "eyeballing" the fluid being transferred, since manufacturing denotes that the measurements are not precise.The transfer pipette consists of a soft bulb for sucking fluid up into the bore of the pipette.Specifically made to be disposed of after use, these pipettes come in large packages for the laboratory.

Plastic precision pipettes are designed to be affixed to a transfer suction bulb, or any manual aspiration device.These tools are graduated in precision increments, as in milliliters.Any other precision measurements are done with automatic aspiration devices, such as the handheld auto pipettes, which have precision control for aspiring down to microliter volumes.

Pipettes "needles" are used in very small volumes.Precision made Plastic pipette tips are used in a variety of scientific and medical research and testing.The handheld automatic preset or adjustable aspirator is used with these specialized tips.They come in an assortment of volumes and colors for easy identification.They usually are shipped in packaging that holds them until use, and provides for "no touch" insertion of the measuring/aspiration device.

Volumetric pipettes are similar to the graduated plastic pipettes, except they are usually made of glass and can handle larger volumes.They are aspirated by either electrical automatic devices set to whatever volumes is required, or are attached to the machines with which they are transferring fluids.

The bench top precision micropipette is also an option for the meticulous-minded laboratory.These electrically powered, computerized exacting pipette systems are designed for the precision decanting of reagents and other fluids in the laboratory.They can handle nearly any volume, from nanoliters to milliliters.There are also manually pumped precision pipette systems, and the common reagents used in a laboratory are commonly transferred using these meticulous laboratory pipette systems.

by:Andrew Long

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