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Surface Comparison of Polypropylene Materials
Used in Pipette Tip Manufacturing |
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The images below compare of the internal surface of Hamilton AdvanTip LT Low Retention pipette tips to standard polypropylene pipette tips and siliconized pipette tips. Photographs were taken of sections cut from the three styles of pipette tips using SEM/EDS. Magnification levels ranged from 50x to 5,000x. |
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Figures 1a -1c Hamilton AdvanTip LT Pipette Tip Even at the highest magnification level, the ultra smooth surface is visibly free of occlusions and cavities which can cause sample retention and sample denaturation in standard polypropylene. |
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Figures 2a -2c Standard Polypropylene Pipette Tip
Occlusions and cavities can be observed on the wall surface. At the highest magnification, surface strands which cause samples to "stick" are clearly visible. |
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Figures 3a -3c Siliconized Pipette Tip
Here again, there is a lack of smoothness of the the walls created by an inconsistent and uneven flow of silicone across the surface. Sample retention occurs even with siliconized pipette tips. |
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