Refiners
Updated 8/21/2009
for assays.  While we don't make recommendations, we have
posted the following links for your education.

This is a BLM study on the ability of individuals/labs to properly
conduct assays.  Essential reading before you get a sample
tested.  Originally printed in the
ICMJ, and posted here with their
permission:


http://www.icmj.com/assay-information.php