I use the Microtox (Vibrio fischeri) solid-phase bioassay for
analyses of sediment toxicity (specifically with estuarine sediments). I
am looking into the occurence of false positives associated with small
grain-size sediments and need to find a supplier who can provide clay
(>63um diameter, preferably kaolin) for generating uncontaminated
If anyone knows of such a supplier or can suggest a method for
generating reference sediments in which the physiochemical properties of
the clay fraction are retained, please let me know.
Department of Biology
University of NC at Wilmington
grimley at sol.cms.uncwil.edu
"Toxicologists do it until they're half-dead."