Recent developments in the assay of ferritin containing drugs

The advent of new stationary phases for gel permeation liquid chromatography (GPLC) capable of withstanding the high pressures of high performance liquid chromatography (HPLC) has opened new avenues for the analysis of large molecules such as ferritin. The exploitation of inductively-coupled plasma atomic emission spectrometry (ICP-AES) as a technique for detection in HPLC has evolved into a significant approach to element analysis and speciation. In general, while the on-line coupling still requires careful optimization, it expediently allows the identification of proteins and the quantification of Fe in ferritin products to be achieved.