TY - JOUR AU - Hyltoft Petersen , Per AU - Blaabjerg , Ole AU - Irjala , Kerttu AU - Icén , Arto AU - Bjøro , Kristian PY - 1993/09/01 Y2 - 2024/03/28 TI - 5.1 External Analytical Quality Assurance for Proteins JF - Upsala Journal of Medical Sciences JA - ujms VL - 98 IS - 3 SE - Original Articles DO - 10.3109/03009739309179319 UR - https://ujms.net/index.php/ujms/article/view/7480 SP - 241-258 AB - In the Nordic Protein Project an external control scheme (external quality assessment) was combined with the two other indispensable aspects of analytical quality, i.e. standardization (with a common high quality calibrator) and specification of needed analytical quality for sharing common reference intervals for nine serum proteins in the Nordic countries. The quality specifications are reliable for the purpose and given in clinical chemical terms - ready for application to the control systems. Further, a control design for disclosing external and internal errors, separately, is designed with respect to calibration and robustness towards analytical interference from turbid patient samples. ER -