20ul Filter Tips are a type of pipette tip commonly used in laboratories to filter small volumes of liquid. While filter tips have many benefits, there are some situations where it may be best not to use them:
Low-viscosity liquids: If you are working with a low-viscosity liquid, such as water, using a filter tip may not be necessary. The filter may slow down the dispensing process, and it could be more efficient to use a regular pipette tip.
Precious samples: If you have a limited amount of a precious sample, using a filter tip may result in a loss of sample due to the retention of liquid in the filter. In such cases, it may be better to use a non-filtered pipette tip.
Chemical compatibility: Some chemicals can interact with the filter material and alter the sample. In such cases, it is important to choose a pipette tip that is compatible with the chemical being used.
Cost: Filter tips are generally more expensive than non-filtered tips. If the experiment does not require the use of a filter, using non-filtered tips can be a more cost-effective option.
Environmental concerns: The use of disposable filter tips can generate a lot of waste, which can have negative impacts on the environment. Using non-filtered tips or reusable pipette tips can help reduce waste and promote sustainability.