THE USE OF INAA FOR THE DETERMINATION OF TRACE-ELEMENTS, IN PARTICULAR CADMIUM, IN PLASTICS IN RELATION TO THE ENFORCEMENT OF POLLUTION STANDARDS

Many plastic products have relatively short life cycles. Upon final destruction, inorganic additives used for pigmentation, as polymer stabilizer or as flame retarding agent are being released to the environment. In a rapidly increasing way governmental authorities are setting limits to the use of inorganic additives, in particular cadmium, in plastics. INAA has attractive characteristics which may make authorities decide to select it for the control programs in relation to the enforcement of pollution standards. In this paper, an evaluation is made of the use of INAA for such analysis; analysis protocols, sensitivities, and observed levels of other trace elements are being discussed.