In a recently published article in the Journal of Biomedical Materials Research, CPG scientists describe a new method of quantifying the amount of Vitamin E, a naturally-occurring antioxidant, in ultra high molecular weight polyethylene (UHMWPE). This technique uses a thermal approach to measure the oxidation resistance of the material via an oxidation induction time measurement. The results are compared to a calibration curve, which then allows determination of the effective Vitamin E concentration in the material following any processing step (e.g. molding, irradiation, sterilization). The technique has better sensitivity than other published techniques. For more information, contact Cambridge Polymer Group or view the publication.