Cordouan Wallis High Resolution Zeta Potential Analysis
Cordouan Wallis High Resolution Zeta Potential Analysis
Cordouan Wallis High Resolution Zeta Potential Analysis
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<strong>Wallis</strong> <br />
<strong>Zeta</strong> potential analyzer<br />
<strong>High</strong>-<strong>Resolution</strong> <strong>Zeta</strong> <strong>Potential</strong> <strong>Analysis</strong><br />
IDEAL FOR<br />
Formulation stability<br />
Nanoparticle<br />
Emulsions<br />
Pharmaceuticals<br />
Petrochemicals<br />
Polymers<br />
Liposomes and bio-colloids<br />
Pigments and inks<br />
… and more<br />
www.cordouan-tech.com
The <strong>Wallis</strong> <br />
»<br />
• <strong>Zeta</strong> potential : -200200mV<br />
• Particle size : 1nm 100µm<br />
• Concentration range : 0.0001 10%/w<br />
<strong>Zeta</strong> potential<br />
unstable? / stable?<br />
Particles in solution are surrounded by an<br />
Electrical Double Layer (EDL) that characterizes<br />
particle-particle interaction. It fully determines<br />
the formulation stability. The measurement of<br />
<strong>Zeta</strong> potential is directly related to particle<br />
charge environment and then inform about<br />
dispersion stability. It is widely use for chemical<br />
synthesis, particle functionalization…etc.<br />
Measure <strong>Zeta</strong> potential !<br />
Dowload the technical note.<br />
» www.cordouan-tech.com<br />
Measurement cell: simple, robust, artefact free<br />
Simple: The dip cell design allows<br />
simple sample injection and prevent<br />
bubble formation. It is compliant with<br />
standard cuvette cell for multiple<br />
analysis benchmarking. Its design<br />
makes it fully compatible with organic<br />
solvent<br />
Robust: The innovative vitreous carbon electrode provides<br />
long life and stability to the electrodes that can be easily<br />
cleaned by standard process like sonication or acid-base<br />
washing.<br />
dip cell = no electro-osmosis<br />
Artefact free: <strong>Zeta</strong> potential is directly related to electrokinetic phenoma like<br />
electrophoretic mobility. The dip cell electrodes design prevents electro-osmosis<br />
during measurement giving accurate results without « mysterious » software<br />
correction.
Robust & easy to handle technology led to its best performance:<br />
10 times more resolution than usual correlation technology<br />
No electro-osmosis<br />
In-field proven technology (LDE)<br />
New & unique electrode material for long life material.<br />
Easy to use measurement cuvettes<br />
Compatible with organic solvents and high-pH suspensions<br />
<strong>High</strong> quality data for accurate and repeatable zeta potential analysis and interpretation.<br />
Easy to use and intuitive graphical user interface (GUI) software.<br />
Usual<br />
method<br />
Raw<br />
data<br />
<strong>Cordouan</strong>’s<br />
method<br />
<strong>High</strong> resolution measurement<br />
WALLIS-ζ is a high resolution <strong>Zeta</strong><br />
potential analyzer. Using dedicated<br />
data acquisition and analysis, it<br />
provides the following unique high<br />
resolution features:<br />
Electrophoretic mobility up to<br />
10 -10 m²/V.s resolution<br />
<strong>Zeta</strong> potential up to 0,1 mV<br />
resolution (in water)<br />
<strong>Zeta</strong> potential<br />
<strong>Zeta</strong> potential<br />
Intuitive GUI software<br />
10 times higher resolution<br />
<strong>High</strong> performances for<br />
advanced measurements<br />
<strong>High</strong> resolution of <strong>Wallis</strong> allow high<br />
quality measurement for:<br />
‣ Precise measurement of IEP<br />
‣ Accurate functionnalization of<br />
colloid<br />
‣ Repeatability of particles synthesis<br />
‣ Advanced particles stability analysis
<strong>Wallis</strong> <br />
<strong>Zeta</strong> potential analyzer<br />
<strong>Zeta</strong> <strong>Potential</strong> <strong>Zeta</strong> potential range -200 mV to 200 mV<br />
Signal<br />
processing<br />
Mobility range<br />
Sample concentration<br />
Cell options<br />
Sample volume<br />
Maximum sample conductivity<br />
Sample Type<br />
Measurement technology<br />
Laser source<br />
10 -10 to 10 -7 m 2 /V.s<br />
0.0001% to 10% w/% (solvent dependent)<br />
Cuvette cell with optical quality windows compatible with organic solvents<br />
Typically 750 µL (Hellma cell – 10 mm light path)<br />
300 mS/cm<br />
Aqueous & organic solvents – pH: 1-14 (depending on cuvette cell material)<br />
Laser Doppler Electrophoresis (LDE)<br />
20 mW diode @635 nm coupled to automated attenuation system. Other<br />
wavelengths available upon request<br />
Measurement angle Single angle for zeta potential at 17°<br />
Data processing algorithm<br />
<strong>Resolution</strong><br />
Detector<br />
Fast Fourier Transform<br />
Mobility = 10 -10 m 2 /V.s or <strong>Zeta</strong> = 0,1 mV ( in water)<br />
Avalanche Photodiode – APD<br />
General Temperature control range inside the cell 10°C to 90°C +/-0,1°C (depending on cuvette cell material)<br />
System<br />
Compliance<br />
Computer interface<br />
Dimensions<br />
Weight<br />
Power<br />
CE certification<br />
ISO norm<br />
USB 2.0 – Windows XP, Seven<br />
45 cm x 30 cm x 40 cm (HWD)<br />
17 kg<br />
100/115/220/240 VAC, 50/60 Hz, 100 W max<br />
CE marked product - Class I laser product, EN 60825-1:2001, CDRH<br />
ISO 13099-2 : 2012 – Colloidal system – methods for zeta-potential<br />
determination – Part 2 : Optical methods<br />
Contact:<br />
sales@cordouan-tech.com<br />
service@cordouan-tech.com<br />
11, avenue de Canteranne<br />
33600 Pessac – France<br />
Tel +33 (0)556 158 045<br />
Fax +33 (0)547 747 491
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