Preparation and homogeneity characterization of ten agricultural/food reference materials for elemental composition

摘要: Preparation and development has been completed of ten agricultural/food reference materials (RMs): bovine muscle powder, corn starch, hard red spring wheat flour, soft winter whole milk gluten, bran, durum egg powder microcrystalline cellulose. Homogeneity tests for 14 elements, Al, Ca, Cd, Co, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, Sr Zn were performed by the initiating laboratories application precise reliable analytical methods based on flame atomic absorption spectrometry graphite furnace spectrometry. An extensive set results obtained from interlaboratory cooperative characterization campaign was assessed to provide homogeneity estimates other elements. Estimates within-laboratory precision indicated that all exhibited acceptable virtually 29 elements (Al, As, B, Ba, Br, Cl, Cr, Hg, I, Mo, N, P, Rb, S, Se, Sr, V, Zn) which best estimate concentration values are available. Two thirds coefficients variation below 5%.