Low Retention Pipette Tips

We employ a unique molding process to produce tips with a uniform field of highly-repellent fluoropolymer molecules that form an impenetrable “superhydrophobic” surface. The result: liquids and molecules are suspended above the polypropylene tip surface, allowing difficult liquids to glide effortlessly in and out of the tip.

The super-repellent surface of Rainin LR tips "normalizes" the flow characteristics of fluids with diverse compositions and physical characteristics (viscosities, surface tension, density, hydrophobicity, etc.) The result: enhanced pipetting accuracy across a broader range of sample types. Rainin Low Retention Pipette Tips provide greater peace of mind and better data fidelity when pipetting.

Rainin Low Retention Pipette Tips are available for LTS and universal-fit pipettes.

The uniform repellent fluoropolymer "field" on the surface of Rainin LR tips prevents any interaction between the sample and the polypropylene tip surface. In this short video, a propylene glycol-based food colorant demonstrates how Rainin LR low retention tips eliminate sheeting activity. By dramatically reducing retained sample after dispensing, Rainin LR Tips eliminates a major source of pipetting inaccuracy.

FinePoint tips taper to a fine orifice diameter. Their slender design, in combination with thin, flexible walls, creates an exceptionally supple tip that assists in sample touch-off. The narrow orifice aperture and thin wall surrounding the orifice provides minimal surface area for residual sample to adhere to during sample dispensing. FinePoint tips discharge completely for optimal pipetting accuracy.

More common manufacturing methods, such as dipping or tumbling tips in a fluoropolymer bath, can produce tips with incomplete and uneven coatings that can adversely affect pipetting accuracy. In addition, tips made with "diamond polished" molds – often touted as low retention – do nothing to prevent samples from reacting with the polypropylene and binding to the tip surface.

Low Retention tips are guaranteed to produce accurate and precise measurements when used with Rainin pipettes and in accordance with their instruction manuals.
  

Rainin Certified Low Retention tips meet or exceed minimum standards for:

• Absence of flash
• Absence of contamination
• Surface smoothness and regularity
• Delivery end geometry, dimensions and finish
• Sealing integrity on EDP, Pipetman & Pipet-Plus pipettes
• Pipetting accuracy (unconventional geometries lead to deviations)

Rainin wide orifice LR low retention tips combine a wide aperture with a super-repellent fluoropolymer surface to accommodate viscous/syrupy liquids, cultured cells and high-molecular polymers (such as genomic DNA). These tips reduce shear force and provide a super-slippery surface to reduce sample retention.

Rainin LR low retention tips are available in many tip styles and sizes, for both LTS and universal-fit pipettes. They come in a selection of packaging options such as racks, GreenPak, SpaceSaver and bulk.

Every one of Rainin LR tips are rigorously tested and certified to be free of:

• DNA
• DNase
• RNase
• Pyrogen
• ATP
• PCR Inhibitors