Zetasizer Nano ZS90, a low-cost zeta potential analyzer from Malvern Instruments, is designed to measure molecular size and particle size at a 90 degree scattering angle utilizing dynamic light scattering. The system provides a perfect solution where similar results to a legacy system with 90 degree scattering optics are needed, or when the ultimate in sizing sensitivity is not required.
The Zetasizer Nano ZS90 can also measure molecular weight using static light scattering, and electrophoretic mobility and zeta potential using Laser Doppler Microelectrophoresis.
The main features of the Zetasizer Nano ZS90 are:
- Zeta potential of nanoparticles and colloids using patented M3-PALS technology
- Molecular weight measurement down to 9,800 Da.
- Size measurement from 0.3 nm (diameter) to 5 µm using 90 degree scattering optics
- Optical filter option to enhance measurements with fluorescent sample
- Alternative laser, 50 mW at 532 nm for samples incompatible with the usual 633 nm laser fitted
- Research software option provides access to additional features and analysis algorithms for the light scattering specialist
- Autotitrator option allows automation of measurements
- Temperature range extension option to 120°C
- 21CFR part 11 software option allows compliance with ER/ES
Unlike other instruments that just sit on people’s shelves and don’t get used, Malvern’s Zetasizer Nano is so useable that colleagues come from other universities to make measurements with it.
Sandra Whaley Bishnoi, Assistant Professor of Chemistry, Illinois Institute of Technology