A Practical Approach to Minimizing Inaccuracy through Traceability,Using Limited Resources

EN 45001. General Criteria For The Operation Of Testing Laboratories. Brussels: European Committee for Standardization, 1989.

ISO 9001. Model For Quality Assurance In Design/Development, Production, Installation and Servicing. Geneva: International Organization for Standardization, 1987.

Organization for Economic Co-operation and Development (OCDE). Good Laboratory Practice in the testing of chemicals: Final report of the group of experts on Good Laboratory Practice. Paris: OCDE, 1982.

BIPM, IFC, IFCC, ISO, IUPAC, IUPAP, OIML. International Vocabulary Of Basic and General Terms In Metrology. 2nd edn. Geneva, International Organization for Standardization, 1993.

Tietz N. A model for comprehensive measurement system in clinical chemistry. Clin Chem 1979; 25: 833–9.

Commission of the European Community. The BCR Programme On Applied Metrology and Chemical Analysis: Projects and Results 1988–1992. Brussels: Commission of the European Community, 1992.

Stöckl D Thienpont L. The combined-target approach: A way out of the proficiency testing dilemma. Arch Pathol Lab Med 1994; 118: 775–6.

Bretaudière JP Dumont G Rej R Bailly M. Suitability of control materials. General principles and methods for investigation. Clin Chem 1981; 27: 798–805.

Miller WG Kaufman HW . CAP conference XXIII on matrix effects and accuracy assessment in clinical chemistry: Introduction. Arch Pathol Lab Med 1993; 117: 343–4.

Fraser CG Petersen P Hyltoft Ricós C Haeckel R. Proposed quality specifications for the imprecision and the inaccuracy of analytical systems for clinical chemistry. Eur J Clin Chem Clin Biochem 1992; 30: 311–17.

Duncan I Mather A Cooper M. The Procedure For the Proposed Cholesterol Reference Method. Atlanta, GA: Center for Disease Control, 1982.

Zwang L Blijenberg BG . Validaton of the ultrafiltration technique for creatinine analysis by HPLC: A comparison with direct serum injection. Eur J Clin Chem Clin Biochem 1992; 30: 861–6.

Westgard JO Groth T. Power functions for statistical control rules. Clin Chem 1979; 25: 863–9.

Passing H Bablok W Glocke M. An optimized design for the establishment of assigned values in control sera. J Clin Chem Clin Biochem 1981; 19: 1167–79.

Ramón F Alsina MJ Alvarez V Cortés M Hernández A Jiménez CV XIII Clinical chemistry (blood) external quality assessment programme of the Spanish Society of Clinical Chemistry, 1992. Quim Clin 1993; 12: 118–73.

Boersma GJM Jansen AP Jansen RTP Leijnse N Van Strik R. Minimizing interlaboratory variation in routine assays of serum cholesterol through the use of serum calibrators. Clin Chem 1986; 32: 943–7.

Bullock DG Moss DW Whitehead TP . External quality assessment of serum activity assays and the effect of calibration on interlaboratory concordance. Ann Clin Biochem 1986; 23: 577–84.

Bullock DG Dumont G Vassault A Aguzzi F Chambers RE Ward A Milford Immunochemical assays of serum proteins: A European external quality survey and the effects of calibration procedures on interlaboratory agreement. Clin Chim Acta 1990; 187: 21–36.

Stöckl D Reinauer H. Development of criteria for evaluation of reference method values. Scand J Clin Lab Invest 1993; 53 (suppl 212): 16–18.