Zeta Potential & Particle Size Analyzer ZC3000 with Real Time Observation


"ZEECOM" 의 특징


1. CCD 카메라를 사용하여 LCD화면으로 10 개의 입자이동을 육안으로 확인하면서 Electric mobility 결정 과정 확인 가능.

2. Laser를 사용하여 20 nm 입자까지 측정이 가능.

3. TV모니터를 통해 직접 확인하며 측정하기 때문에 비극성 용매등의 효과로 유발되는 예상치 못한 측정 장애 요소 극복이 가능.

4. Laser Doppler나 PALS 및 초음파를 이용한 측정 장치를 이용한 방법은 시험기기 내부에서 일어나는 이상 현상을 전혀 감지할수 없기에 PC에 표시되는 결과를 그냥 인정 해야만했던 (Black box 내부에서와 같이 시험중 어떤 현상이 일어나는지 확인할 방법이 없었음) 기존 시험 방법의 어려움을 극복 하실수 있습니다.

5. Nonaqueous system 을 위한 High voltage option


                Zeta Potential Analysis with ZEECOM Technology


Colloidal particles dispersed in a solution are electrically charged due to their ionic characteristics and dipolar attributes.


Each particle dispersed in a solution is surrounded by oppositely charged ions called the fixed layer. Outside the fixed layer, there are varying compositions of ions of opposite polarities, forming a cloud-like area. This area is called the diffuse double layer, and the whole area is electrically neutral.


When a voltage is applied to the solution in which particles are dispersed, particles are attracted to the electrode of the opposite polarity, accompanied by the fixed layer and part of the diffuse double layer, or internal side of the "sliding surface".

Dispersed particles

Aggregated particles

Zeta potential is considered to be the electric potential of this inner area including this conceptual"sliding surface". As this electric potential approaches zero, particles tend to aggregate.


The static layer is computed using the following formula (which is embedded in the Zeecom software).

The static layer is computed using the following formula (which is embedded in the Zeecom software).

Zeta Potential (Smoluchowski’s Formula)

This Zeecom unit uses a microscope to observe particle electrophoresis migration on a monitor while performing image processing to determine the particle migration speed, which is then converted into the zeta potential value.


To eliminate errors due to electroosmotic flow caused by any electrostatic charge on the measurement cell, the zeta potential is measured at the static layer, whose position can be calculated from the width and depth of the cell. (The software performs this calculation automatically)

Zeta Potential Analyzer : ZEECOM
Software Features

Analytical software

  • Obtain distribution of particle migration speeds.
  • Automatically calculates the isoelectric point by changing the pH of the solvent.
  • Automatically calculates distribution of zeta potential values for histogram display

Measurement mode

  • After first setting the start and goal lines, particle values can be checked manually by clicking with the mouse when the particles pass a line (potential of individual particles can be checked).

    click to enlarge

    Visually identify target particle and record electrophoresis mobility

  • Electrophoresis mobility of target individual particle is recorded and accumulated each time it passes Start Line (S) and Goal Line (G) by simple mouse-click.

    User can identify the actual measurement targets, whether dispersed or aggregated particles, with eye observation on real time basis.

Selecting one of the four methods

The automatic measurement is usually prepared by selecting one of the four methods.

Flow velocity distribution

(in the cell)

Isoelectric point


(distribution of zeta potential)