An evaluation of the automated OLLI CD discrete analyser.

We report the evaluation of a novel clinical chemical analyser, the OLLI CD, which is highly automated compared to its predecessor, the OLLI 3000 analyser. The precision of the dispensing unit, the OLLI D, was assessed with the aid of aqueous solutions of 131I. Sample pipetting of 10 microliter resulted in a coefficient of variation of 0.81%. Lower volumes were unreliable. However, precision of the addition of start reagent for kinetic methods appeared to be only 2.7% for 20 microliter, 1.7% for 50 microliter and 2.1% for 250 microliter. The linearity of response and the precision of the photometer unit, the OLLI C, was assessed with cobalt(II)sulfate solutions. The linearity ranged up to an absorbance of 2.5. The reproducibility of the colorimeter ranged from A510nm 0.0011 to 0.0047. With this analyser good correlations were obtained for alanine aminotransferase (EC 2.6.1.2) vs LKB 8600 reaction rate analyser; for creatinine vs Mark II Autoanalyzer; and for total protein vs SMA 6/60 Autoanalyzer. These three determinations showed acceptable between-day variations. General instrument performance was acceptable.