Particle Size Analysis

Light Scattering

• 90Plus
  
• FOQELS
  
• BI-200SM

Centrifugal Sedimentation

• BI-DCP
  
• BI-XDC

Zeta Potential

Colloidal Particles

• ZetaPlus
  
• ZetaPALS

Macro Surfaces

• BI-EKA ElectroKinetic Analyser

Light Scattering

• BI-200SM
  
• BI-MwA
  
• FOQELS
  
• BI-9000AT

Accessories

• BI-DNDC
  
• BI-870
  
• BI-SFS
  

Particle Size Standards and Microspheres

• Certified Particle Size Standards
  
• Research and Test Particles
  
• Fluorescent Microspheres
  
• Reagent Microspheres
  
• Standards for Particle Counting Methods
  
• Particles for Special Applications
  
• NEW from Duke Scientific - Microspheres For Flow Cytometry

90Plus - Simple Yet Powerful
NanoParticle Size Distribution Analyser

Dynamic Light Scattering (also called PCS) provides a fast, simple method for submicron particle sizing. Random intensity fluctuations in scattered laser light arising from the Brownian motion of colloidal particles are analysed to give either a simple mean size and polydispersity (distribution width) or complete distribution data even for multimodal distributions.

Features at a glance

• Rapid and accurate particle size distributions

• Dynamic light scattering at 90° and 15°

• Multimodal and unimodal size distributions

• Range <1 nm to >6 µm

• Easy to use Windows™ software

• Customizable reports, SPC charts

• High power 35 mW diode laser

• Ideal for fast, routine sizing applications in research or quality control

• Compact bench top unit, complete with printer and built-in computer

• Optional zeta potential modules available

• FOQELS non-invasive back-scatter module for sizing in concentrates available

• Molecular weight determination by dynamic and static light scattering

•21CFR Part11 Software available

Rapid, Reliable and Accurate Analysis

The Brookhaven 90Plus particle sizer incorporates all you need for fast, routine, submicron measurements.

Using Dynamic Light Scattering (DLS), most measurements take only a minute or two. The built-in computer has ample power for the Windows™-based software and an external computer option is available if preferred. The standard 35 mW diode laser coupled with the optional avalanche photo diode (APD) detector gives exceptional sensitivity and is ideal for weak and strong scatterers alike.

Either or both of the BI-Zeta and BI-PALS options for zeta potential measurements can be fitted from new or, if preferred, added later.

For most samples, low cost plastic disposable cells can be used, requiring about 2-3mL of dilute sample. Round or square glass cells are also available. Small volume cells ranging from as low as 10µL through 50 µL disposable to 300 µL can also be used.

Typical applications of the 90Plus include polymer colloids (latex), liposomes, emulsions and microemulsions, pharmaceuticals, pigments, toners.