JS94J Zeta Potential Measurement Instrument

Product Introduction

The JS94J Zeta Potential Measurement Instrument is a solid micro-electrophoresis analyzer designed to measure the Zeta potential of particles dispersed in liquid systems and the interfacial electrical properties of emulsion droplets. It helps researchers evaluate particle surface charge, determine isoelectric points, and investigate interfacial reaction mechanisms.

The instrument features a compact, open electrophoresis cell that requires only 0.5 mL of sample per measurement. Its carefully designed electrode holder works with the electrophoresis cup to provide a stable measurement arrangement. A three-dimensional positioning platform helps users locate the measurement area through a computer-displayed crosshair image.

The JS94J uses a semiconductor near-field optical illumination system and a constant low-frequency switching power supply to support stable, efficient measurements. A temperature probe continuously monitors ambient temperature, allowing the software to incorporate temperature data into Zeta potential calculations.

It is suitable for research, quality evaluation, and teaching applications in cosmetics, mineral processing, papermaking, healthcare, construction materials, ultrafine materials, environmental protection, and marine chemistry.

Performance Features

•  Low sample consumption: Requires only 0.5 mL of sample per measurement, reducing sample use and operating costs.

•  Open electrophoresis cell: The cup-shaped cell design is easy to operate and clean.

•  Stable electrode assembly: The electrode holder is designed to work closely with the electrophoresis cup. Silver, platinum, and titanium metal-wire electrodes are available.

• Three-dimensional positioning: A 3D platform and computer crosshair display help users identify the measurement position.

•  Near-field optical illumination: Semiconductor light-emitting technology uses only tens of microwatts of power, helping minimize thermal effects on measurement conditions.

•  Low-frequency switching power supply: Constant low-frequency switching helps prevent electrode polarization and improve measurement speed.

• Automatic temperature monitoring: A temperature probe continuously samples ambient temperature and transmits readings to the computer.

• Automated calculation: Software uses temperature information to adjust calculation parameters for Zeta potential measurement.

Working Principle

The JS94J uses the solid micro-electrophoresis method to evaluate the electrical properties of particle-liquid and emulsion interfaces.

When an electric field is applied to a dispersion, charged particles migrate through the liquid according to their electrophoretic mobility. The instrument uses its optical observation system to identify the particle measurement region and monitor electrophoretic behavior. The resulting measurement data are used to calculate Zeta potential, which indicates the electrical potential associated with the particle-liquid interface.

By measuring Zeta potential over different pH conditions, researchers can identify the isoelectric point, where the measured Zeta potential approaches zero. This information helps evaluate particle surface charge, dispersion stability, and interfacial reaction behavior.

Technical Parameters

Application Scenarios

•  Cosmetics: Evaluate the surface charge and dispersion properties of cosmetic particles and emulsions.

•  Mineral processing: Study the surface electrical properties of mineral particles and their dispersion behavior.

•  Papermaking: Investigate particle surface charge in pulp and papermaking-related aqueous systems.

• Healthcare and pharmaceutical research: Characterize the interfacial electrical properties of suitable dispersed systems.

• Construction materials: Study the surface charge characteristics of fine particles and material suspensions.

•  Ultrafine materials: Evaluate particle surface charge and isoelectric points.

• Environmental protection: Analyze particle-liquid interface properties in environmental samples.

•  Marine chemistry: Investigate interfacial electrical behavior in aqueous and marine-related systems.

• Academic research and teaching: Demonstrate electrophoresis, Zeta potential, and isoelectric point measurement principles.

Comparison: JS94J vs. Other Zeta Potential Measurement Approaches

Frequently Asked Questions

1. What does the JS94J Zeta potential instrument measure?

It measures the Zeta potential of particles in liquid dispersions and the interfacial electrical properties of emulsion droplets. It can also be used to determine isoelectric points and study interfacial reaction mechanisms.

2. What particle size range is suitable for the JS94J?

The instrument is suitable for particles with sizes from 0.1 to 10 μm in water-based dispersion systems.

3. How much sample is required for each measurement?

The instrument requires approximately 0.5 mL of sample per measurement, helping reduce sample consumption.

4. What is the pH measurement range?

The general operating pH range is 2.0–12.0. The instrument can also be used over an extended range of 1.6–13.0, with pH adjustment increments of 0.1.

5. How does the JS94J help determine the isoelectric point?

Researchers can measure Zeta potential at different pH values. The pH at which the Zeta potential approaches zero indicates the isoelectric point.

6. Does the instrument monitor temperature automatically?

Yes. A temperature probe continuously samples ambient temperature and sends the readings to the computer for use in Zeta potential calculations.

7. Which electrode materials are available?

The electrode assembly can use silver, platinum, and titanium metal-wire electrodes.

8. What is the measurement accuracy of the JS94J?

The specified systematic measurement error is within 5%.

9. Which industries can use the JS94J?

It is suitable for cosmetics, mineral processing, papermaking, healthcare, construction materials, ultrafine materials, environmental protection, marine chemistry, and academic research.