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  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
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  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
  • タイタンテクノロジーズ株式会社
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Particle Characterization

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NanoBrook_Zeta + DLS

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NanoBrook Omni / ZetaPALS

Zeta Potential Analyzer Utilizing Phase Analysis Light Scattering

 

A whole new concept.....

Unique to Brookhaven! For the difficult cases

The PALS-method does not measure frequency shift but the phase difference of scattered light compared to a reference beam. As the phase difference is much faster to detect, this method is up to 100 times more precise and reproducible than the traditional method. Only this method permits determinations in non polar liquids (oils, organic solvents) or highly conductive suspensions (high salt concentrations).

Zeta potential for the difficult cases...

In organic solvents

In oily or viscous media

In high-salt suspensions

Near the I.E.P.

1000 times more sensitive than other techniques

Disposable cuvettes, no contamination or alignment

Built in automatic procedures and parameters

Easy to use

Upgradeable to include full particle sizing functionality

 

Specifications

Zeta Potential Size range for measurement 1 nm to 100 µ

Mobility range 10-11 to 10-7 m2/V*s

Zeta potential range -220 mV to 220 mV (*)

Maximum sample concentration 10% v/v (*)

Sample volume 180 µL, 600 µL, 1250 µL

Maximum sample conductivity 30 S/m

Signal processing Phase Analysis Light Scattering, PALS

Particle Size Size range (radius) 3 microns (*)

Sample volume 10 µL, 40 µL, 1 - 3 mL

Concentration range 0.1 mg/mL to 10% v/v (*)

Molecular Weight Molecular weight range (estimated from hydrodynamic diameter) 1 KDa to 25 MDa

Molecular weight range (calculated using Debye plot) requires BI-APD 1 KDa to 25 MDa

Minimum sample volume 10 µL

General Temperature control range -5 °C to 110 °C, ± 0.2 °C

Measurement angles Three angles, two for particle sizing one for zeta potential

Condensation control Purge facility using dry air, nitrogen preferred

Standard laser 35 mW red diode laser, nom 660 nm

Correlator TurboCorr, 25 ns min, 100% real-time, 100% eff.

System Compliance CE certification Class I laser product, EN 60825-1:2001, CDRH

System Dimensions 23.3 cm x 42.7 cm x 48.1 cm (HWD)

Weight 15 kg

Power 100/115/220/240 VAC, 50/60 Hz, 150 W max

Notes: (*) Sample type dependant.

A policy of continual improvement may lead to specification changes.

 

Typical Applications

Liposomes and biocolloids

Ceramics and refractories

Pigments and inks

Pharmaceuticals

Emulsions (foodstuffs, cosmetics)

Wastewater treatment monitoring

Carbon blacks

Latexes

 


Features at a glance

For measurements of very low mobilities, the Brookhaven ZetaPALS is the answer. The only answer! With concepts developed at Bristol University and Brookhaven Instruments, the ZetaPALS determines zeta potential using Phase Analysis Light Scattering: A technique that is up to 1,000 times more sensitive than traditional light scattering methods based on the shifted frequency spectrum.

Electrostatic repulsion of colloidal particles is often the key to understanding the stability of any dispersion. A simple, easy measurement of the electrophoretic mobility "even in nonpolar liquids" yields valuable information. Measurements made in water and other polar liquids are easy and fast with the Brookhaven ZetaPlus. Such measurements cover the range of typically ±6 - 100 mV, corresponding to mobilities of ± 0.5-8x10-8 m2 /V·s. The ZetaPALS covers this full range, of course, and extends it by a factor of 1000 in sensitivity!

Principles of Operation

The ZetaPALS utilizes phase analysis light scattering to determine the electrophoretic mobility of charged, colloidal suspensions. Unlike its cousin, Laser Doppler Velocimetry (LDV) (sometimes called Laser Doppler Electrophoresis (LDE)), the PALS technique does not require the application of large fields which may result in thermal problems. Because in the measurement of phase shift, the particles need only to move a fraction of their own diameter to yield good results. In salt concentrations up to 3 molar and with electric fields as small as 1 or 2 V/cm enough movement is induced to get excellent results. In addition, the Autotracking feature compensates for thermal drift.

 

 

Simple clear presentation

 

The screen image above shows the results of an actual experiment with a ZetaPALS instrument. The important parameters and results are seen at a glance. The excellent agreement of the five runs in this experiment is obvious as is the match of experimental curve (red) and it's parametrized version (black). As with all Brookhaven instruments the user can simply produce a customized report using the supplied color printer.

 

 

Something more challenging

Of course the ZetaPALS can quickly and easily yield results from all "regular" samples but its real strength is in the difficult cases and to demonstrate the performance of this premium instrument where others fail we offer the following table.

Aggressive solvents such as DMF, THF, DMSO, MEK etc are easily accommodated by the Brookhaven ZetaPALS system with the use of our special solvent resistant electrodes and glass sample cells. The extension of zeta potential measurements into the realm of such systems is just another standout property of the Brookhaven ZetaPALS.

Unusual solvent? If your solvent is unusual then it's dielectric constant is probably unknown. In this case our BI-870 DielectricConstant Meter will quickly easily and accurately provide the information necessary for a zeta potential measurement.

Additional Capabilities

Of course every ZetaPALS system also contains a complete ZetaPlus system and this has the special ability to characterize multimodal zeta potential distributions if they exist.

The ZetaPALS instrument is also available with the full capability of our 90Plus particle sizer and this combination instrument provides a benchtop particle characterization center of great power.

 

 

 

 

Titan Technologies, K.K.

8-5-7-301 Minami-Senju, Arakawa-Ku, Tokyo 116-0003 Japan