What is the difference between a serological pipette and a Mohr pipette?

Mohr pipettes: Have hash marks always end before the tip. Serological pipettes: have marks that continue all the way down to the tip.

What is the difference between a serological and a measuring pipette?

The key difference between volumetric and serological pipettes is that volumetric pipettes are calibrated to deliver a certain volume of a solution through free drainage, whereas serological pipettes are calibrated all the way to the tip, and the last drop of the solution has to be blown out.

What is a Mohr pipette used for?

A Mohr pipette, also known as a graduated pipette, is a type of pipette used to measure the volume of the liquid dispensed, although not as accurately as a volumetric pipette. These use a series of marked lines (as on a graduated cylinder) to indicate the different volumes.

Is Mohr or volumetric pipette more accurate?

Graduated pipettes are less accurate than volumetric pipettes. Mohr graduated pipettes, which are sometimes called “drain out pipettes”, are marked with a zero at the start of their conical end, while Serological graduated pipettes, also known as “blow out pipettes”, do not display zero marks.

What is a serologic 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.

How does a Mohr pipet differ from a volumetric pipet?

Graduated pipettes (Mohr pipette) have a scale divided into units of one and of 1/10th of a millilitre. Because of their wide necks it is less accurate than the volumetric pipette. They are used when taking volume of solutions in which accuracy does not have to be very high.

How accurate is a Mohr pipette?

A Mohr graduated pipette provide an accurate way of delivering small volumes of liquids. The accuracy and readability of this 10ml-capacity Class B borosilicate glass pipette is +/-0.1 ml; diameter is approximately 11 mm. The glass tube has permanent graduations in a descending scale for ease of use.

Is Mohr pipette to contain or to deliver?

A Mohr Pipet is a graduated pipet that is designd to deliver small portions of a liquid or solution. These portions are determined by recording the difference between the initial and final volume readings.

How do you read a Mohr pipette?

One method to only dispense a small amount of liquid is with your finger on the top slowly rotate the pipette until the liquid drops down to the desired mark as shown.

Can Mohr pipet be dried in oven?

If glassware is to be dried, allow it to drain or use lint-free paper towels. Never dry volumetric glassware in an oven! The heat will distort the glass and change the calibrated volumes.

When should you use a serological pipette?

The best time to use serological pipette is when transferring liquids between receptacles, mixing chemical solutions, or laying reagents that are composed of different densities. Each of these procedures requires a high attention to detail when it comes to the aspirating and dispensing of your solution.

How is a serological pipette used?

The serological pipette is frequently used in the laboratory for transferring milliliter volumes of liquid, from less than 1 ml to up to 50 ml. The pipettes can be sterile, plastic, and disposable or sterilizable, glass and reusable.

Are serological pipettes plastic?

The Gilson disposable plastic serological pipettes are perfect for use with MACROMAN® to help you in your daily cell-culture, molecular biology and microbiology applications.

Are serological pipettes sterile?

Designed for accurate and rapid fluid dispensing, serological pipettes are sterile, pyrogen-free, cotton plugged, and can be used for a variety of liquid handling applications (certified DNase/RNase free). They are manufactured from transparent medical grade polystyrene and sterilized by gamma radiation.

How long are serological pipettes?

Serological Pipets, Individually Wrapped

100mL Serological Pipet available Improved longer length 25mL Serological Pipet with -10mL graduations (Part No.

What are transfer pipettes?

Transfer pipets are disposable plastic pipets used to transfer small volumes of liquids. They consist of a long, slender tube and a molded bulb which can be gently compressed and relaxed to remove or dispense a desired liquid.

What are transfer pipettes made of?


Samco transfer pipettes are made of shatterproof, nontoxic polyethylene. Their low-affinity surface reduces loss of cells and valuable proteins due to binding. They can be frozen in liquid nitrogen, or heat sealed for storage.

Can transfer pipettes be autoclaved?

Perform safe and easy sampling from large containers using these extra-long transfer pipettes, perfect for tissue culture applications. Measure more than one volume accurately by using these graduated polyethylene transfer pipettes. Built-in pipette bulb eliminates need for plugging, packaging and autoclaving.