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Journal of Automatic Chemistry
Volume 11 (1989), Issue 4, Pages 159-163
http://dx.doi.org/10.1155/S1463924689000349

Evaluation of the Hitachi 717 analyser

1Servei d'Anàlisis Clíniques, Hospital Germans Trías i Pujol, Carretera de Canyet s/n, Badalona, Barcelona 08916, Spain
2Servei d'Anàlisis Clíniques, Centre d'Assistència Primària Dr. Robert, Plaça de la Medicina s/n, Badalona, Barcelona 08915, Spain

Copyright © 1989 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The selective multitest Boehringer Mannheim Hitachi 717 analyser was evaluated according to the guidelines of the Comisión de Instrumentación de la Sociedad Española de Química Clinica and the European Committee for Clinical Laboratory Standards. The evaluation was performed in two steps: examination of the analytical units and evaluation in routine operation.

The evaluation of the analytical units included a photometric study: the inaccuracy is acceptable for 340 and 405 nm; the imprecision ranges from 0.12 to 0.95% at 340 nm and from 0.30 to 0.73 at 405 nm, the linearity shows some dispersion at low absorbance for NADH at 340 nm, the drift is negligible, the imprecision of the pipette delivery system increases when the sample pipette operates with 3 μl, the reagent pipette imprecision is acceptable and the temperature control system is good.

Under routine working conditions, seven determinations were studied: glucose, creatinine, iron, total protein, AST, ALP and calcium. The within-run imprecision (CV) ranged from 0.6% for total protein and AST to 6.9% for iron. The between run imprecision ranged from 2.4% for glucose to 9.7% for iron. Some contamination was found in the carry-over study. The relative inaccuracy is good for all the constituents assayed.