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"This is a very stable device. Ours have been running for more than 10 years. The handling of the cell is sometimes a bit complicated, but it can be taken care of with the experience acquired. The good thing is that we do not have an automatic titration unit. So each sample is still prepared independently and this restricts the black-box situation a bit. It is black-box when it comes to data treatment. We hope that our machine continues to work. But we would like to have another, smaller device as well. "
A whole new concept… Unique to Brookhaven!
For the difficult cases: For measurements of very low mobilities, the Brookhaven ZetaPALS is the answer, The only answer! With concepts developed at Bristol University and Brookhaven Instruments, the ZetaPALS determines zeta potential using Phase Analysis Light Scattering: A technique that is up to 1,000 times more sensitive than traditional light scattering methods based on the shifted frequency spectrum. Electrostatic repulsion of colloidal particles is often the key to understanding the stability of any dispersion. A simple, easy measurement of the electrophoretic mobility --even in nonpolar liquids-- yields valuable information. Measurements made in water and other polar liquids are easy and fast with the Brookhaven ZetaPlus. Such measurements cover the range of typically ± 6 - 100 mV, corresponding to mobilities of ± 0.5-8x10-8 m2/V·s. The ZetaPALS covers this full range, of course, and extends it by a factor of 1000 in sensitivity!