Zetasizer Nano ZS

Malvern, UK

The world’s most widely used particle analyzer!

The Zetasizer Nano ZS is a high performance two angle, particle size, zeta potential and molecular weight analyzer. Ideal for the measurement of small volume samples, samples at very low or high concentration and the detection of aggregates. Using Non-Invasive Backscatter optics (NIBS) it has significantly better performance than systems using 90° scattering optics.

How is size measured for nanoparticles?

Dynamic Light Scattering (DLS) is used to measure particle size. This technique measures the diffusion of particles moving under Brownian motion, and converts this to size and a size distribution using the Stokes-Einstein relationship. Non-Invasive Back Scatter technology (NIBS) is incorporated to give the highest sensitivity simultaneously with the highest size and concentration range. Automated positioning within the measurement cell provides accurate results for both dilute and concentrated samples.

How is zeta potential measured?

Laser Doppler Micro-electrophoresis is used to measure zeta potential. An electric field is applied to a solution of molecules or a dispersion of particles, which then move with a velocity related to their zeta potential. This velocity is measured using a patented laser interferometric technique called M3-PALS (Phase analysis Light Scattering). This enables the calculation of electrophoretic mobility and from this the zeta potential and zeta potential distribution.

Specifications

• Measures particles ranging from 0.3 to 10,000 nanometers
• Ability to measure wide concentration range – ppb to 40% concentration
• Zeta potential measurement range: -500 to + 500 mv
• Molecular weight range: 980Da to 20 MDa

Do you have a lot of samples? We can offer you a good deal!

• Pay for 40 samples in advance and take credit for 50 samples (20% discount)
• Pay for 100 samples in advance and take credit for 135 samples (35% discount)