Please contact the device specialist before making any requests.

Specialist : Dr. Bilge GEDİK ULUOCAK

Phone : +90 212 359 72 30
E-mail : gedikb@bogazici.edu.tr

Brookhaven Instruments 90Plus Particle Size/Zeta Analyzer is available in our laboratory.

PARTICLE SIZE ANALYSIS

The 90Plus performs fast, routine submicron particle size measurements on a wide variety of samples and concentrations. It is an ideal instrument for measuring colloids, latexes, micelles, mi-croemulsions, proteins, and other nanoparticles. Based on the principles of dynamic light scattering (DLS), also known as QELS (quasi elastic light scattering), most measurements only take a minute or two.

Features :

• Particle sizing from 2 nm to 3 μm
• Multimodal and unimodal size distribution software: Average size & size distribution width, lognormal fit, and multimodal size distribution provided as standard
• Scattering angles 90°
• 35 mW laser with high sensitivity detector

Application Areas:

• Proteins/complexes/DNA
• Polymer Latexes
• Pharmaceutical Preparations
• Oil/Water and Water/Oil Emulsions
• Paints and Pigments
• Inks and Toners
• Cosmetic Formulations

ZETA POTENTIAL OPTION

Zeta potential is a measure of surface charge on a particle and is readily measured with the BI-Zeta option. Since zeta potential is a measure of the repulsive forces in electrostatically-stabilized systems, it is an excellent indicator of relative stability. The sign and magnitude of zeta potential, as a function of pH, salt, or dispersing agent concentration are indicators of stability against flocculation or coagulation.

Applications include waste water treatment and stability of pigments, latexes, ceramics, and other colloidal dispersions.