TY - EJOUR T1 - Analyses with the KODAK-Ektachem. Accuracy Control Using Reference Method Values and the Influence of Protein Concentration. Part I. Electrolytes AU - Külpmann, W. R. AU - Maibaum, P. AU - Sonntag, O. PY - 1990 LA - und PB - Kooperation de Gruyter JO - Clinical Chemistry and Laboratory Medicine DO - 10.1515/cclm.1990.28.11.825 ER -