ANALYSIS OF SELENIUM IN MILK AND WHEAT SAMPLE BY WET DIGESTION AND HYDRIDE GENERATION INDUCTIVELY-COUPLED PLASMA SPECTROMETRY

Selenium is both an essential and a toxic element. Therefore, analytic al methods for accurate determination of selenium levels in biological and agricultural materials are important. A relatively rapid, accurat e, and precise method is presented for the determination of selenium i n milk and wheat samples. The method requires only 1 g powdered milk a nd 0.5 g of wheat flour and employs a wet digestion in a reflux tube u sing a combination of nitric and hydrochloric acids. Quantitation is c arried out by the inductively coupled plasma spectrometry coupled with hydride generation system. We analyzed IAEA A-11-powdered milk and Na tional Institute of Standards and Technology Wheat flour SRM 1567a to verify the accuracy of the method.