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This document describes a procedure for the determination of inorganic arsenic in animal feeding stuffs of marine origin by solid phase extraction (SPE) and hydride generation atomic absorption spectrometry (HGAAS). The method has been successfully tested in a collaborative trial with a working range of 0,19 mg/kg and below 2,6 mg/kg (HORRATvalues < 2). This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).