Trace analysis of released metallic ions in static immersion test for characterization of metallic biomaterials

Abstract

For characterization of corrosion resistance of metallic biomaterials, determination of trace amounts of metallic ions released from the materials in static immersion into simulated body fluids were investigated. In a pre-treatment method by sulfuric acid, sensitive, precise and accurate determination of the trace metallic elements in simulated body fluids could be performed by an inductively coupled plasma-optical emission spectrometry. For accurate analysis, it was necessary to employ a matrix-matched solution for the calibration. Moreover, usage of a vessel made of tetrafluoro ethylene-perfluoro alkylvinyl ether copolymer in the static immersion test was recommended for the prevention of contamination. Thus, it was possible to determine μg dm -3 order of elements in simulated body fluids and evaluate nano-gram order of the released metallic ions. © 2009 The Japan Institute of Metals.