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Electrokinetic Analyzer for Solid Surface Analysis: SurPASS™ 3

SurPASS™ 3 is a high-end electrokinetic analyzer featuring fully automated zeta potential analysis of macroscopic solids in real-life conditions. SurPASS™ 3 employs the classic streaming potential and streaming current method for a direct analysis of the surface zeta potential. The zeta potential is related to the surface charge at a solid/liquid interface and is a key parameter for understanding surface properties and developing new specialized materials. Automatic pH scans and time-dependent recording of adsorption kinetics allow for a deep understanding of the surface chemistry.

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Key Features

State-of-the-art solid surface analysis

  • Direct solid/liquid interface analysis by means of streaming potential and streaming current measurement
  • Full range of zeta potential down to a few millivolts
  • Instant access to information on surface charge

From tiny particles to large wafers

  • Elaborate measuring cells for any sample geometry
  • Cylindrical Cell for powders (min. particle size 25 µm ) and fibers
  • Clamping Cell for non-destructive measurement of planar solids
  • Adjustable Gap Cell for small samples (20 mm x 10 mm, 14 mm dia., 15 mm dia.)
  • Sample-specific measuring cells for contact lenses, hollow fiber membranes, and flexible tubings

Higher sample throughput

  • Quick exchange of measuring cells, ‘plug-in and go’ functionality
  • Recording of measuring data at >5 Hz
  • Zeta potential measurement in <2 minutes

Fully automated measurements

  • Real-time visualization of key parameters
  • Automated pH scans and detection of the isoelectric point
  • Recording of liquid-on-solid surface adsorption kinetics

Technical Specifications

Measuring range
Streaming potential ± 2000 mV ± (0.2 % + 4 μV)
Streaming current ± 2 mA ± (0.2 % + 1 pA)
Cell resistance 5 Ω to 20 MΩ ± (2 % + 0.5 Ω)
Pressure measurement 3500 mbar ± (0.2 % + 0.5 mbar)
external pressure supply (compressed N2) required for differential pressure > 1500
pH value pH 2 to pH 12
Conductivity 0.1 to 1000 mS/m
Temperature 20 °C to 40 °C
Sample size requirements
Clamping Cell 35 mm x 15 mm
Max. thickness: 40 mm
Cylindrical Cell Particle size >25 μm
Adjustable Gap Cell 20 mm x 10 mm
Max. thickness: 2 mm
Adjustable Gap Cell for Disks Diameter: 14 mm or 15 mm
Max. thickness: 2 mm
Technical requirements
Mains supply AC 115 to 230 V, 50 to 60 Hz, 200 VA
Dimensions 600 mm x 432 mm x 245 mm (D x W x H)
Footprint: 612 mm x 536 mm (D x W)
Clearance: 360 mm
Weight 26 kg
Software requirements
  • Microsoft Windows® 7 32/64 bit with SP1 or later is required. Windows 7 Starter is not supported.
    Microsoft Windows® 8 32/64 bit
    Microsoft Windows® Server 2008/2008 R2 32/64 bit with Service Pack 2 or higher is required for Windows Server 2008
    Microsoft Windows® 10 32/64 bit
  • Intel® Core™ i3 CPU
  • 4 GB RAM (depends on operating system)
  • 20 GB free disk space
  • 1 free USB port
  • Screen resolution of at least 1024 x 768 at True Color (32 bit)

Applications

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Detection of Native Oxide on Silicon Nitride Wafers

Detection of Native Oxide on Silicon Nitride Wafers

The zeta potential is a very sensitive parameter to detect traces of impurities on solid surfaces and their removal during surface cleaning.

Effect of Bleaching on the Streaming Potential of Human Hair

Effect of Bleaching on the Streaming Potential of Human Hair

The streaming potential method reveals the changes of the hair surface upon hair treatment processes and supports the optimization of cosmetic products.

Enhancement of Membrane Separation Performance

Enhancement of Membrane Separation Performance

The zeta potential is sensitive to small changes in the surface chemistry and thus suitable for monitoring membrane performance.

Inner Surface Treatment of Haemodialysis Membranes

Inner Surface Treatment of Haemodialysis Membranes

The zeta potential measurement assists in the improvement of the biocompatibility of haemodialysis membranes.

Monitoring of Membrane Fouling with Zeta Potential

Monitoring of Membrane Fouling with Zeta Potential

Zeta potential measurements elucidate the fouling behavior of membranes and contribute to the optimization of membrane performance.

Monitoring the Washing Efficiency of Stained Cotton Fabrics

Monitoring the Washing Efficiency of Stained Cotton Fabrics

The zeta potential serves as an indicator for stain removal of differently soiled textile fabrics and thus helps to optimize detergent formulations.

Optimization of Sizing Systems for Glass Fiber Finishing

Optimization of Sizing Systems for Glass Fiber Finishing

The zeta potential is very sensitive to changes in the surface chemistry of glass fibers after modification with different sizing systems.

Self-Disinfectant Surfaces - Correlation between Antimicrobial Activity and Zeta Potential

Self-Disinfectant Surfaces - Correlation between Antimicrobial Activity and Zeta Potential

Zeta potential analysis enables the detection of functional groups introduced by additives in polymer compounds.

Studying the Effect of Tear Fluid on Contact Lenses

Studying the Effect of Tear Fluid on Contact Lenses

The zeta potential indicates changes in the surface chemistry of contact lenses upon wearing and is thus suited to study biocompatible surface coatings.

Surface Modification of Kapton® Films

Surface Modification of Kapton® Films

The zeta potential is a valuable parameter to follow polymer surface modifications and to tailor-make biocompatible devices for medical applications.

The Zeta Potential of Track-Etched PVDF Membranes

The Zeta Potential of Track-Etched PVDF Membranes

The zeta potential gives comprehensive information about the charging behaviour of inner and outer membrane surfaces.

Tuning of Solid Surface Properties by Self-Assembled Monolayers

Tuning of Solid Surface Properties by Self-Assembled Monolayers

The zeta potential measurement assists in tailoring the properties of technical and biomedical surfaces using self-assembled monolayers.

Understanding Filter Efficiency - Virus Removal in Depth Filtration

Understanding Filter Efficiency - Virus Removal in Depth Filtration

Zeta potential, as the indicator for surface charge, helps to predict and to tune the efficiency of filter materials.

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