[Adaptation of methotrexate determination in serum with Unicel DxC600(®)].

High-dose methotrexate treatment requires pharmacological monitoring in order to tailor administration of folinic acid to reduce side effects. The aim of the study was to validate the adaptation of the EMIT reagent on the l'Unicel DxC 600® Beckman Coulter. The establishment of two assays was necessary to obtain a quantification limit as low as possible (0.