Just because a tip has a filter doesn’t necessarily mean that it is effective in blocking aerosols.      

Thermo Scientific Matrix filter tips are tested for many types of potential filter failure and every lot must pass a rigorous battery of tests. If accidental contact with the filter should occur (due to over-pipetting), your sample can be recovered by simply dispensing back out. Because the filter is hydrophobic, the sample will remain uncontaminated and will not be trapped in the filter.       

Benefits       

• Stringent testing guarantees filter tips that effectively block aerosols       
• Hydrophobic polyethylene filter material ensures no particulates contaminate samples       
• Inadvertent contact with filter will not contaminate sample or result in sample loss       
• Easy-to-open packaging maintains product sterility while providing easy access       
• Hinged lid allows rack to be opened without laying lid on benchtop, helping to maintain sterility       
• Racks are sealed in thick polyethylene bag for sterility; easy to open with simple snap-and-tear packaging       

Stringent Filter Testing       

• Every filter must meet certain porosity requirements and must form a complete barrier across face of tip       
• To ensure defects are not present, two specific tests are performed: mercury intrusion and particle count testing       
• Mercury Intrusion Testing (QC 13.1 - QC 13.8) ensures the filter itself meets specific aerosol blocking requirements       
• Particle Count Testing (Test Protocol QAS-0100) ensures filter is effective at blocking aerosols after installation into tip; ensures proper shape and fit of filter       
• Every lot of tips is tested by drawing a vacuum of aerosols against the filter and ensuring particles do not pass through      

Recommended for:       

• Bacteriology       
• Gel loading       
• PCR setup       
• Preventing cross-contamination during routine pipetting