Erythrocyte ferritin concentration: Analytical performance of the immunoenzymatic IMx-Ferritin (Abbott) assay

Cristina Novembrino, Antonella Porcella, Dario Conte, Amedeo F. de Vecchi, Gherardo Buccianti, Silvia Lonati, Lorena Duca, Alberto Ciani, Fabrizia Bamonti-Catena

Research output: Contribution to journalArticlepeer-review


Together with serum ferritin, erythrocyte ferritin can be a valuable diagnostic tool for evaluating the degree of impaired iron metabolism in different diseases. We collected peripheral blood samples from 64 subjects (22 healthy volunteers, 20 patients with hereditary hemochromatosis, and 22 patients on regular hemodialysis with secondary anemia) to evaluate whether an immunoenzymatic method generally used for serum ferritin can also be used to determine erythrocyte ferritin levels under various conditions of body iron status. Serum and erythrocyte ferritin levels were assayed in parallel using a microparticle enzyme immunoassay (MEIA) IMx-Ferritin kit and an IMx analyzer. The inter-assay imprecision of the serum and erythrocyte ferritin assays was 4.9% and 5.05%, the intra-assay imprecision was 2.2% and 2.3%, and the mean recovery was 102% (range 96-105%) and 101% (range 99-105%), respectively. Both serum and erythrocyte ferritin assays showed a detection limit of 1 μg/L and good linearity (R2=0.99) in the intervals 13.9-443 and 3.9-135.6 μg/L, respectively. Our findings demonstrate that the IMx-Ferritin assay currently used to measure serum ferritin levels can also be adopted to measure erythrocyte ferritin insofar as it clearly discriminates high and low erythrocyte ferritin levels in cases of both iron overload and deficiency.

Original languageEnglish
Pages (from-to)449-453
Number of pages5
JournalClinical Chemistry and Laboratory Medicine
Issue number4
Publication statusPublished - Feb 7 2005


  • Analytical performance
  • Erythrocyte ferritin
  • Iron disorders
  • Microparticle enzyme immunoassay (MEIA)
  • Serum ferritin

ASJC Scopus subject areas

  • Clinical Biochemistry


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