Refiners
Updated 11/2/2006
We are often asked about refiners, and where to send samples
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:

Preface (pdf)*   Study signatories, Introduction, Assays
Generally, Survey Methods, Standard and Blanks Used,
Interpreting Results

Study Results (pdf)*

* requires Acrobat Reader