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GRADUATED PIPETTES


Graduated Pipettes

Graduated pipettes are vital instruments in scientific laboratories, designed to accurately measure and transfer liquid volumes. Their usefulness spans many areas of research and analysis, facilitating tasks that require accuracy and repeatability.

What are laboratory graduated pipettes?

Graduated pipettes are versatile laboratory instruments that allow precise adjustments in the amount of liquid handled thanks to the graduations marked on their tubing. These markings facilitate the measurement of various volumes according to the need of the experiment, providing flexibility in multiple applications. Unlike volumetric pipettes, which are designed to dispense a fixed and exact volume each time, graduated pipettes offer the ability to measure variable volumes, making them ideal for tasks that require changes in the amount of liquid during a procedure.

What are graduated pipettes used for? Uses

Graduated pipettes are essential in many industries because of their ability to measure varying volumes of liquids accurately. In scientific research, they are crucial for precise measurements that determine the quality and results of experiments. In industry, they facilitate quality processes by ensuring consistency in production. In education, they help teach precise laboratory techniques, while in medicine, they are indispensable for preparing accurate diagnostic and therapeutic solutions, directly affecting treatment efficacy and diagnostic accuracy.

What material are Pobel graduated pipettes made of?

Pobel graduated pipettes are made of soda glass, a material widely valued for its exceptional durability and chemical resistance. This type of glass is ideal for laboratory applications requiring high accuracy in volume measurement due to its stability and resistance to most chemicals. Soda glass not only guarantees the structural integrity of the pipettes under heavy use, but also ensures that there will be no chemical interactions that could alter the composition of the substances being worked with. This property is crucial for maintaining the purity of reagents and samples, avoiding cross-contamination and ensuring reliable and repeatable results in critical analyses and experiments.

How are graduated pipettes used?

Using a graduated pipette in the laboratory is a process that requires technique and precision. Depending on the type of pipette, the method may vary slightly, but generally involves the following steps:

  1. Aspiration: the pipette tip is placed in the liquid and a mechanism (such as a bulb or piston) is used to aspirate the liquid upwards to a specific graduated mark, ensuring that the desired volume is measured.
  2. Transfer: Carefully transfer the pipette to the new container and dispense the liquid. The dispensing technique must be controlled to avoid bubbles or spillage, which could affect the accuracy of the measurement.
  3. Cleaning: After use, it is essential to clean the pipette properly to avoid cross-contamination between samples or deterioration of the instrument.

This process varies slightly depending on the pipette.

Types of Pobel graduated pipettes

Pobel offers different models of graduated pipettes adapted to different needs. These are:

  • Class A graduated pipettes: Pobel class A graduated pipettes are designed to offer maximum precision and reliability in the measurement of liquid volumes. Made of soda glass according to ISO 835, these pipettes are ideal for intensive laboratory use due to their chemical and thermal resistance. Each pipette has an amber graduation all the way to the tip for easy reading, with colour coding for quick identification of capacity. They are calibrated for full discharge (TD, EX), guaranteeing accuracy in every use.
  • Class B graduated pipettes: Pobel class B graduated pipettes are made of soda glass and calibrated to ISO 835 to ensure accuracy suitable for laboratory tasks that do not require the extremely tight tolerances of class A pipettes. These pipettes are designed for cost-effective functionality, ideal for educational and research applications where reliable, but not critically accurate measurements are needed. They are durable and feature amber graduations for easy volume reading and colour coding for quick capacity identification.
  • Graduated culture pipettes: Pobel's short graduated culture pipettes are accurate, specialised tools made of soda glass.  These pipettes are designed to be calibrated by pouring (TD, EX) and have a standardised aspiration port suitable for accommodating a cotton plug. They are ideal for handling precise volumes in culture applications where accurate and repeatable measurement is required.

Why buy graduated pipettes from Pobel?

Choosing graduated pipettes from Pobel means choosing quality and precision. Our products are designed to meet the highest standards and provide reliable and accurate results, making them a valuable investment for any laboratory.

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