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Features at a glance
Reliable, Accurate, and Accurate Analysis
The NanoBrook ZetaPlus is the simplest and most accurate particle electrophoresis system available. This revolutionary instrument has been designed to eliminate the short coming inherent in other zeta potential instruments. The ZetaPlus software is simple and intuitive to operate but yet offers flexibility and a full range of means for those that whish to tune their experiments to specific circumstances.
The screen image shown below indicates the clear and concise presentation. Information obtained from the sample is updated in real time and the user can select from several display formats. A table of physical constants for many common suspending fluids is provided but the user may provide their own values if desired. Printed reports are fully customizable.
The NanoBrook ZetaPlus measures complete electrophoretic mobility distributions in seconds including multimodals (an example of bimodal zeta potential sample can be seen on the result screen from analyzing a mixture of charged particles.)
In the example below the result of analyzing a mixture of alpha and gamma Aluminas in 1 mMolar KCI at pH10 is displayed. The left peak is identified with the green cursor and shown to have a zeta potential of -75 mV. If the other peak is chosen the value given is -5.00 mV. The ability of the NanoBrook ZetaPlus to provide this information distinguishes it from other methods which provide only an ensemble average.
Derive Extended Information
The user can tabulate or graph any appropriate pair of parameters allowing, for example, the determination of the iso-electric point (IEP) as in the example below. The NanoBrook ZetaPlus is provided with a pH probe.
Unique Cell Design
The unique cell configuration eliminates the electroosmotic effect: No stationary levels, no alignment, and no calibration are required; as evidenced by the excellent agreement with NIST1980, a standard reference material. The NanoBrook ZetaPlus uses low cost, disposable sample cells. There is no assembly or maintenance required: Cross contamination is eliminated. Glass and quartz cells are available optionally. The same basic cell design is used with the NanoBrook 90Plus Zeta, ZetaPALS, 90Plus PALS, and Omni.
Sample Type Most nanoparticle, polymer and colloidal-sized materials, suspended in any non-absorbing liquid, with relative permittivity (dielectric constant) > 20 and viscosity < 5 cP Size Range 1 nm to 100 µm diameter, sample dependent Mobility range 10-9 to 10-7 m2 / V * s Zeta potential range -220 mV to 220 mV, sample dependent Sample cells 180 µL, 600 µL, 1250 µL Maximum sample concentration 40% v/v, sample dependent Maximum sample conductivity 7.5 mS/cm Signal processing Electrophoretic Light Scattering, ELS Precision ± 3%, depending on salt concentration Temperature control range -5 °C to 110 °C ± 0.2 °C Condensation control Purge facility using dry air, nitrogen preferred Standard laser 40 mW red diode laser, nominal 640 nm wavelength Scattering angle 15° Data Presentation Doppler Frequency Shift, electrophoretic mobility, zeta potential suing Smoluchowski Hückel, or Henry Power Requirements 100/115/220/240 VAC, 50/60 Hz, 150 Watts Diemensions 23.3 x 42.7 x 48.1 cm (HWD) Weight
Temperature 10 °C to 75 °C
Humidity 0% to 95%, non-condensing
CE certification Class I laser product, EN 60825-1:2001, CDRH
BI-ZTU Autotitrator, 4-pump, pH, temp, conductance for use with acids, bases, surfactants, dispersing agents, salts and other additives to determine the IEP and trend of zeta potential with concentration of additive. BI-ZTU includes one BI-ZELF and one BI-ZELF-B for use with aqueous samples. BI-ZELF Plastic electrode assembly for use with BI-ZTU in flow mode, including one BI-ZELF-B BI-ZELF-B Box of 2 plastic flow cells for use with BI-ZELF BI-870 Dielectric constant meter improves accuracy when calculating zeta potential in solvent mixtures and specialty solvents. BI-IQOQPQ Qualification for installation, operation and performance.
BI-SCP Box of 100 plastic cells, use with BI-ZEL electrode assembly and aqueous samples. Or BI-SVE175 Electrode assembly for aqueous systems, with BI-SCP cell, 175 µL sample volume. BI-ELECCK Electrode cleaning kit including wand and polishing strip, for use with BI-ZEL and BI-SREL BI-CC Nitrogen-purge facility for condensation control. BI-SCP Box of 100 plastic cells, use with 1.25 mL, 600 µL, and 180 µL assemblies and aqueous solutions and suspensions. BI-ZR5 Zeta reference material for validation, blue pigment for use in water, -(44 ± 8)mV.
Note: Current users of the ZetaPlus may upgrade to include PALS and particle sizing including backscatter provided their instrument has the necessary mechanics, optics and hardware. Contact the factory for more information.