Stabino

The Stabino® is a zeta potential instrument for analysing and optimising the stability of colloids and dispersions, based on measurement of streaming potential.

Employing a unique oscillating piston design, the system incorporates rapid pH and polyelectrolyte titrations for investigation of stable pH regions, Iso-Electric Point (IEP), charge density and surface functionalisation. The system is ideally suited to formulation development and has applications in quality control.

Key Features:

  • Fast pH & polyelectrolyte titrations – calculate IEP or charge density in minutes
  • High resolution zeta potential plots – based on accurate streaming potential measurements
  • Mix & Measure principle – oscillating piston for continuous sample mixing avoids sedimentation – often a problem when approaching the iso-electric point
  • Highly flexible, non-optical technique – accurate measurements including non-spherical particles, at a wide range of concentrations, up to 40% w/v
  • Intuitive, self-explaining software – making setting up a measurement extremely quick and easy
  • Market-leading post-sales support – from both Analytik and Colloid Metrix

As exclusive distributor for the UK and Ireland, Analytik is proud to supply the Stabino® from Colloid Metrix. Through Analytik, you’ll have access to our team of experts to help develop your application and get the most out of your investment.

For more information, or to discuss your requirements with a product specialist, please call us on +44 (0)1954 232 776 or email info@analytik.co.uk.

Description

Zeta Potential Analysis with the Stabino

The Stabino® is a zeta potential instrument for analysing and optimising the stability of colloids and dispersions, based on measurement of streaming potential.

Employing a unique oscillating piston design, the system incorporates rapid pH and polyelectrolyte titrations for investigation of stable pH regions, Iso-Electric Point (IEP), charge density and surface functionalisation. The system is ideally suited to formulation development and has applications in quality control.

Stabino | Zeta Potential Analyser

Particles become immobilised on the PTFE beaker and oscillating piston. The fluid stream moves the mobile ion cloud surrounding each particle, allowing the electrodes to measure streaming potential.

Method

The heart of the Stabino is cylindrical PTFE measuring beaker and piston. Sample is added to the beaker and the piston oscillates at a constant frequency during measurement. Particles become immobilised on the surface of the beaker and piston, allowing the fluid stream created by the moving piston to shift the mobile ion cloud around each particle up and down, creating an oscillating frequency. The potential created is detected and measured by the two electrodes as streaming potential. From this, zeta potential is calculated.

Titrations

Zeta potential alone is often not sufficient information to assess the stability of a colloid. +/-30mV is often quoted as a threshold for stability, but this does not give the full picture and is only relevant to the sample as it stands in that exact chemical environment. It is entirely possible for two samples to have -30mV zeta potential but have very different stabilities. The Stabino provides a full insight into the colloid being assessed, primarily via pH and polyelectrolyte titrations.

  • pH titrations – allow the assessment of stable pH regions and determination of the iso-electric point (IEP) with extremely high resolution. IEP determination via classical light-scattering methods is problematic due particles agglomerating and then sedimenting out when approaching the IEP. The Stabino constantly mixes the sample via the oscillating piston and is therefore not hindered by this problem and can measure the exact pH at which zero charge is achieved.
  • Polyelectrolyte titrations – by titrating a counter-charged polyelectrolyte solution, information on charge density can be estimated. This gives a much greater understanding of how stable a dispersion is. Predictions of shelf-life or stability over time can be built up using this method.
  • Salt titrations – allow investigation of the relationship between conductivity and zeta potential Salt titrations are relevant to applications such as protein aggregation or waste water treatment, where changing the conductivity deliberately causes particles in solution to form aggregates so they can be filtered out of solution.
  • Other titrations – ultimately, any titrant can use used on the Stabino and its effect on zeta potential monitored. Some custom applications may include assessing the effect of varying volumes of an additive or stabiliser, different amounts of pigment in an ink solution and so on.

The Stabino affords the user complete control over their experiments, giving extremely high resolution zeta potential plots thanks to the ability to titrate quickly and frequently, with potential readings taken every 5 seconds.

Interested in the Stabino®? Request a quote or call us on +44(0)1954 232 776 to discuss your requirements.

Applications

  • Functional end-group formulation
  • Core shell design
  • Formulation optimisation
  • Stable pH regions
  • Iso-Electric Point (IEP) determination
  • Prediction of shelf-life

 

Key Industries

  • Ceramics
  • Inks/pigments/paints
  • Catalysts
  • Coatings
  • Waste water
  • Nano-metals
  • Minerals

Videos

Stabino® – Efficient Stability Analysis System for Colloids and Dispersions

Charge Mapping with StabiSizer® / Stabino®

Rapid pH-Titration

Rapid Polyelectrolyte Titration

Rapid Conductivity Titration

All Titrations simultaneously with Size

Webinars

The Duo Stabino / NANO-flex

PDF Icon Webinar The DUO Stabino®/NANO-flex

Accessories

Datasheet

PDF Icon Particle Metrix Product Overview

Whitepapers

PDF Icon Comprehensive Ionic Charge Sensing for Macromolecules and Particles

Technical/Application Notes

PDF Icon Colloidal Alumina: Stability Statement by Zeta Potential doubtful

PDF Icon Stabino® Zeta Potential – Titrations now from 0°C to 90°C – and condensation-free

PDF Icon Comparing three zeta potential analysers for pulp characterisation

PDF Icon Controlling critical coagulation of pigments and fillers

PDF Icon Charge titration – a fast alternative to the forciertest

PDF Icon Flocculant optimised by charge titration with Stabino®

PDF Icon Zeta potential distribution of 1 nm particles

PDF Icon Ionic Charge Mapping of Macromolecular Solutions and Dispersions

PDF Icon Easy understanding of particle charge and efficient use of it

PDF Icon Particle Charge Titrations on cationic SiO2- and Al2O3- Suspensions

PDF Icon Isoelectric point determination of powder suspensions

PDF Icon Influencing algae reproduction conditions by ionic additives

PDF Icon Solubility of Proteins by Ionic Charge Monitoring

PDF Icon Controlling the Efficiency of the Functionalisation of Carbon Nanotubes by Ionic Charge Titration

News & User Stories

News Icon The European Centre for Dispersion Technology (EZD) uses the Combination of Stabino® & NANO-flex® (DUO-S) for the Characterization of various Dispersions

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