Pipette tips rack

Pipette tips rack: an organizer for pipette tips, essential in labs to prevent contamination and ensure accuracy in liquid measurements.

About this subject

A pipette tips rack is a fundamental item in any laboratory that handles liquids with micropipettes. It keeps pipette tips organized, accessible, and protected from cross-contamination. Racks are designed to fit on benchtops and can accommodate tips of different volumes, such as 10 µL, 200 µL, and 1000 µL.

There are racks for standard tips and for filter tips, the latter used to prevent contamination of the pipette itself. Most racks are made of laboratory-grade polypropylene, resistant to chemicals and autoclavable at 121°C, allowing sterilization for aseptic work.

Proper use of racks optimizes workflow: the operator can preload multiple tips and dispense them quickly without touching the end that contacts the sample. Many racks are compatible with multichannel pipettes, speeding up processes in high-throughput assays such as PCR and sequencing.

Besides organization, racks contribute to traceability, as some come with lot identification and expiration dates. Refilling empty racks with fresh tips is a common practice to reduce plastic waste. In regulated laboratories, correct disposal of racks after use is part of biosafety protocols.

Frequently Asked Questions

Why use a pipette tip rack instead of storing tips loose?

A rack prevents contamination by keeping tips upright and protected, and facilitates quick access and compatibility with multichannel pipettes.

How to sterilize a pipette tip rack?

Polypropylene racks can be autoclaved at 121°C for 15 to 20 minutes. They must be heat-resistant and not deform during the process.

What sizes of tip racks are available?

The most common racks hold 96 tips (plate format) or 24 tips (strip format), in volumes of 10 µL, 20 µL, 200 µL, 300 µL, and 1000 µL.