Evaluation of a Coulter Chemistry Unit

Seventeen channels of a Coulter Chemistry Unit were evaluated. The evaluation included within-run and day-to-day precision, recovery, dilution, carryover and interference studies; as well as correlation studies between the Coulter Chemistry Unit and the procedures currently used in the author's laboratory. Criteria for acceptance of a procedure are outlined. Five channels of the particular instrument studied were found acceptable by the author's criteria, six channels had correctable defects, and six channels had either reagent or instrumentation deficiencies.