FAQs
Tips
Can Excella pipette tips and the rack be autoclaved?
All filtered pipette tips (Racks and Refills) cannot be autoclaved.
Non-filtered Excella pipette tips and Racks can be autoclaved for 15 min at 121 °C and 1 bar. Higher temperatures or longer autoclaving cycles may cause damage to the Racks. Remove the shrink-wrap before autoclaving, insert refills into racks and close them before autoclaving. Let the tips dry fully at room temperature before usage. Racks can be autoclaved at least 100 times without deformation.
What is the shelf life of Excella tips?
The shelf life of all Excella pipette tip is at least 5 years when stored correctly. The expiry date of each product is also laser printed on each individual pipette tip tray.
What are Excella Racks and tips made of?
The Excella pipette tip Racks and tips are made from pure polypropylene.
What is the chemical resistance of Excella pipette tips to acids, organic solvents?
The Excella pipette tips are manufactured from pure polypropylene and thus show a high resistance to the common liquids used in labs.
In order to test this, one 10 µL tip was incubated for 24 h in the stated chemical and showed no changes in colour or size. The Excella tips can thusly be rated as resistant against the following chemicals:
• Acetic acid, 12 % and 96 %
• Acetone, ≥ 99.8 %
• Acetonitrile ≥ 99.9 %
• Ammonia solution, 2 % and 25 %
• Caustic soda, 4 %
• Chloroform
• CsCl, saturated
• Dichlormethane
• Diethyl ether
• DMSO 10 %, 50 % and 100 %
• EDTA, pH at pH 8, 0.5 M
• Ethanol (denat.), 96 %
• Ethylacetate ≥ 99.5 %
• Formaldehyde, 37 %
• Glutaraldehyde, 25 %,
• Glycerine, 50 %
• Guanidine isothiocyanate, 4 M
• Guanidinhydrochloride, 6 M
• Hydrochloric acid, 3.6 % and 32 %
• Isoamylacohol, 98 %
• Isopropanol, 99.8 %
• Methanol
• Mineral oil, 6 %
• Nitric acid, 6.3 %
• Petroleum ether
• Phenol, H2O saturated
• SDS, 1%
• Sodium acetate at pH 5.2, 2 M
• Sodium hydroxide solution, 20 %
• Sulphuric acid, 16 % and 96 %
• Toluene
• Trichloroacetic acid, 10 % and 40 %
• Trifluoroacetic acid, 10 %
• TRIS at pH 7.5, 1 M
• Triton Y-100, 1 %
• Tween 20, 1 %
• Water
How should Excella pipette tips be stored?
They should be stored between +5 and +40 °C in dry conditions and should be protected from sunlight and UV-light.
I have been using other pipette tips with my pipette previously. Is there anything I need to consider when switching to Excella tips?
When changing the tip type, the pipettes must be recalibrated with the Excella tips to ensure accurate and precise pipetting results within error tolerances of the pipette and ISO8655:2022
What is the filter in the filtered pipette tips made of?
The filter inside the pipette tips is made of high-density polyethylene (HDPE) material, free from additives.
Which pipettes can be used with Excella pipette tips?
The Excella pipette tips are designed with a universal cone to fit onto most pipettes that have a universal pipette cone.
Microcentrifuge Tubes
Can Excella microcentrifuge tubes be autoclaved?
Microcentrifuge tubes (1.5 and 2 mL) can be autoclaved for 20 min at 121 °C with opened lids.
In case of large amount of condense water, tubes can be dried in a heating
chamber at 70 °C.
What are Excella microcentrifuge tubes made of?
They are made of virgin polypropylene
What is the maximum g-force that Excella microcentrifuge tubes can be used at?
Both the 1.5 and 2 mL microcentrifuge tubes can be centrifuged at up to 20,000 xg. If filled with high density liquids and solutions, up to 13,000 xg are endured.
Can samples be stored at -80 °C in the microcentrifuge stubes?
Yes, both the 1.5 and 2 mL microcentrifuge tubes withstand freezing at up to -86 °C.
PCR Tubes, Strips and Plates
Can Excella PCR plates be autoclaved?
No.
What are Excella PCR plates and PCR tubes made of?
The PCR plates are made of ultra-pure polypropylene.
Can Excella PCR plates be sealed?
Yes, they can be sealed with the typical common sealing options for heat-Sealing, Film and Foil.
How do I identify the orientation of the PCR Plate?
All alphanumeric writing is marked in high-contrast black for easy well identification. For (semi)-skirted plates, the A12-corner is bevelled for easy orientation of the plate.