PMID: 9159903May 1, 1997Paper

Particle size distribution in ground biological samples

Chemosphere
D KoglinJ D Schladot

Abstract

Modern trace and retrospective analysis of Environmental Specimen Bank (ESB) samples require surplus material prepared and characterized as reference materials. Before the biological samples could be analyzed and stored for long periods at cryogenic temperatures, the materials have to be pre-crushed. As a second step, a milling and homogenization procedure has to follow. For this preparation, a grinding device is cooled with liquid nitrogen to a temperature of -190 degrees C. It is a significant condition for homogeneous samples that at least 90% of the particles should be smaller than 200 microns. In the German ESB the particle size distribution of the processed material is determined by means of a laser particle sizer. The decrease of particle sizes of deer liver and bream muscles after different grinding procedures as well as the consequences of ultrasonic treatment of the sample before particle size measurements have been investigated.

Citations

Apr 19, 2008·Analytical and Bioanalytical Chemistry·Katherine M HetterPatrick J Parsons
May 6, 2008·Journal of Materials Science. Materials in Medicine·M E R CoimbraP G Coelho
Aug 10, 2006·Journal of Environmental Monitoring : JEM·Heinz RüdelChrista Schröter-Kermani
Jul 24, 2008·Journal of Agricultural and Food Chemistry·William R MindakP Michael Bolger

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