Zetatrac utilizes the unique Nanotrac probe technology to provide fast, accurate, convenient and cost effective Zeta Potential measurements without the need for disposable cuvettes. Zetatrac measures Zeta Potential by determining the mobility of particles as they move from one side of the sample cell to the other. A potential difference is applied to the sample cell and charged particles move to the electrode of opposite polarity at a velocity proportional to their charge. Using the principles of Dynamic Light Scattering, light from a laser is scattered and is frequency shifted under the Doppler Effect in relation to it’s velocity. By determining the velocity of the charged particle, the Zeta Potential can be calculated. Zetatrac uses Microtrac’s proprietary Controlled Reference Method to generate a power spectrum (inverse of photon correlation curve) of the moving charged particles. Unlike other methods, Zetatrac can measure Zeta Potential in both high and low concentration suspensions.

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