Zeta Potential Analysis
GE&R performs zeta potential measurements with a Brookhaven ZetaPLUS machine. This device measures zeta potential and hydrodynamic diameter of dilute colloidal dispersions. Samples are measured in 2.5mL cuvettes with a 1cm path length.
Results within 5 business days.
Please include a sample submission form and a copy of your samples SDS (safety data sheet).
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Zeta potential is indicative of the charge on the surface of a colloid dispersed in solution. The technique uses electrophoretic light scattering to estimate the electric potential in the interfacial double layer. The magnitude of the zeta potential is a key indicator of the stability of colloidal dispersions.
For single point measurements, please provide at least 5ml of the sample with the colloids or particles of interest dispersed in a solvent. For 5 point measurements please provide at least 25ml of sample. The colloid concentration should be high enough to see some opaqueness or turbidity. Highly concentrated samples will be diluted as needed for accurate measurement. Please specify colloid material and its refractive index, along with solvent composition in the sample submission form. For 5 point measurements, sample pH will be adjusted using KOH and HNO3 unless otherwise indicated. Questions on how to prepare your samples? We can help. Please contact us for assistance.