Measurement of nanoparticles in concentrated suspensions

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00:00:00 Measuring Nanoparticles in Concentrated Suspensions
00:01:54 Measuring Nanoparticles in Concentrated Suspensions
00:02:19 Contents
00:03:30 Dynamic Light Scattering
00:03:38 Components of a Malvern Dynamic Light Scattering Instrument
00:05:13 Dynamic Light Scattering and Brownian Motion
00:06:05 Dynamic Light Scattering
00:07:28 Measuring Nanoparticles in Concentrated Suspensions
00:07:35 Sample Concentration Overview
00:09:16 Lower Concentration Limit
00:11:17 Upper Concentration Limit: Multiple Scattering (1)
00:12:41 Upper Concentration Limit: Multiple Scattering (2)
00:13:16 Non Invasive Back Scatter: NIBS
00:15:40 Upper Concentration Limit: Multiple Scattering (3)
00:17:13 Upper Concentration Limit: Restricted Diffusion (1)
00:18:06 Upper Concentration Limit: Restricted Diffusion (2)
00:19:16 Upper Concentration Limit: Restricted Diffusion (3)
00:20:05 Upper Concentration Limit: Aggregation Effects (1)
00:20:32 Upper Concentration Limit: Aggregation Effects (2)
00:21:01 Upper Concentration Limit: Aggregation Effects (3)
00:22:10 Upper Concentration Limit: Electrostatic Interactions (1)
00:22:51 Upper Concentration Limit: Electrostatic Interactions (2)
00:23:52 Upper Concentration Limit: Electrostatic Interactions (3)
00:24:03 Recommended Sample Concentrations
00:28:01 Application Examples
00:28:09 Pigment Dispersions
00:29:17 Pigment Dispersions
00:31:26 Pigment Dispersions (measured at 1.5% w/v)
00:32:25 Pigment Dispersions (measured at 1.5% w/v)
00:32:39 Pigment Dispersions (measured at 1.5% w/v)
00:32:57 Effect of Calcium on Emulsion Stability:20% w/v Emulsion
00:34:23 Effect of Calcium on Emulsion Stability:20% w/v Emulsion
00:34:40 Effect of Calcium on Emulsion Stability:20% w/v Emulsion
00:35:02 Conclusions
00:36:24 Contact information
The Zetasizer Nano uses an optical technique call NIBS that enables the measurement of the size of concentrated samples, many not requiring dilution. However the analyst must be aware of the care required when interpreting the results