Our Zeta-Meter System 4.0
Our Zeta-Meter System 4.0 measures electrophoretic mobility and zeta potential. The basic instrument is for aqueous suspending liquids but accessories are available for working with organic suspending liquids.
Zeta potential measurements
are made using a technique called microelectrophoresis. The
measurement is very direct. First, your sample is placed in a viewing
chamber called an electrophoresis cell. Then an electric field is
activated. This causes the colloids to move with a velocity that is
proportional to their zeta potential, and in a direction that indicates
whether their charge is positive or negative.Colloids are comfortably observed and tracked using video optics or a high quality stereo microscope. Once your sample is in the cell, you get your first results in a matter of seconds, and complete results in minutes.
Just fill the cell with your
sample, insert the electrodes and connect them to the Zeta-Meter 4.0
unit. It determines the specific conductance of your sample and helps
select the appropriate voltage. Energize the electrodes and
watch the colloids as they move across a grid in your microscope or
video display. Track one by simply pressing a keypad button and holding it down while your colloid moves across the grid. When you release the button, your colloid’s zeta potential (or electrophoretic mobility) is instantly displayed.
The data display shows you: how many
colloids you have tracked, their average zeta potential (or
electrophoretic mobility) and the statistical standard deviation of
your values. In addition, temperature and average specific conductance
are also displayed. You can also review your data in detail at any time
by using the keypad to step through each individual tracking
value. We supply software that lets you feed your data directly into the serial port of a personal computer. Our software imports your data into a database that lets you store, search, graph, print and review your data.
Please see Catalog No. 15 for complete details. It is available for download, or from us by mail.