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Updated: Aug 15, 2026

In Situ Characterization of Boehmite Particles in Water Using Liquid SEM
Published on: September 27, 2017
Direct preparation of particles from liquid suspension for ESEM or SEM analysis
1Surface and Microanalysis Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA. scott.wight@nist.gov
Abstract:
A simplified method for the preparation of particles from liquid suspensions has been developed. Particles are deposited directly on carbon planchets for rapid analysis by environmental scanning electron microscopy or by conventional scanning electron microscopy after an additional drying step. This is accomplished by filtering the liquid through thin carbon planchets. Three different grades of graphite were investigated for their suitability as the source material for these planchets. The high quality isomolded graphite is recommended for the filtration and direct observation of particles by electron microscopy. This technique is demonstrated for particles in hydraulic fluid and aquatic suspended particulate material from a natural water source.
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