Erythropoietin solution preparation

摘要

The present invention relates to an erythropoietin-containing solution preparation containing a poloxamer and having a pH of 6.5 to 7.5. The present invention also relates to a method for quantifying a protein in a trace amount, the method including the following steps: binding a protein sample to a high-intensity fluorescent dye; separating a desired analyte from the obtained sample by an appropriate separation means; and quantifying the desired analyte and converting the amount of the analyte into the amount of the protein.