The analytical perfomance of the Dimension(R) XL clinical chemical sys
tem was evaluated. Ihe XL is the latest addition to the Dimension fami
ly of instruments; is is a random access analyser with a throughput up
to 740 tests/hour. Regression analysis of method comparison studies w
ith Dimension AR yielded slopes of 0.93 to 1.03 and correlation coeffi
cients greater than or equal to 0.96 for 28 assays. Excellent precisio
n performance was also observed. New, instrument features of the XL ar
e discussed.