Inorganic particle size distribution by x-ray sedimentation

• 0.1 to 300 µm particle diameters
• Large (50 mL dispersed) volume for representative sampling of heterogeneous materials
• Complete particle accounting – including particles outside the direct measurement range
• Available automation: measure up to 18 samples unattended
• Conforms to ISO 13317-3, ASTM B761 and Committee C28 on Advanced Ceramic

Overview

The Micromeritics SediGraph continues to be a prefered standard instrument for particle size analysis in many laboratories throughout the world. Whether in a rugged production environment or a controlled laboratory setting, the SediGraph continues to produce accurate results with superior reliability. Particle size distribution is measured using the sedimentation method. Particle mass is measured directly via X-ray absorption. By measuring the rate at which particles fall under gravity through a liquid having known properties as described by Stokes’ law, the SediGraph determines the equivalent spherical diameter of particles ranging from 0.1 to 300 µm. The new generation SediGraph III Plus combines this proven technique with new technology to deliver reproducible and highly accurate particle size information, completing most analyses in minutes.

Technology

The SediGraph III Plus determines particle size distributions and statistics, such as D10, D50, and D90, based on direct mass concentration detection. Basic and advanced reporting available at the touch of a button. The SediGraph III Plus can be coupled with an optional MasterTech autosampler for continuous monitoring of a production process and have data pushed to a network or cloud for remote access.

The MasterTech™ 052 Autosampler

The MasterTech 052 Autosampler provides assurance that samples are prepared and analyzed exactly the same way, every time. The MasterTech is designed to increase throughput, repeatability, and reproducibility while reducing operator involvement. Up to 18 samples can be queued to run sequentially and completely unattended, including automatic stirring or sonication prior to transfer to the analysis system. The SediGraph’s operating software controls the MasterTech, and information about dispersion is stored in the sample file for future reference.

The MasterTech features a powerful ultrasonic probe for sample redispersion. Power to the probe tip is adjustable and the driving circuit is self-tuning for maintaining efficient and consistent sonic energy levels. A front-panel digital readout lets you know when the desired power is reached, and that same power is applied each time the method is repeated. The SediGraph III Plus is designed to accommodate the MasterTech on top of the analytical unit, thus conserving valuable bench space.