Development of a microwave sample preparation method for the determination of arsenic in humus and moss samples by graphite furnace atomic absorption spectrometry.

摘要: Two sample decomposition methods were optimized for the determination of arsenic by graphite furnace atomic absorption spectrometry (GFAAS) in moss and humus samples. In first method, 5,0 ml HNO 3 3,0 H 2 O used 500 mg sample. When samples decomposed this way a slight, undissolved residue remained. Therefore, another including hydrofluoric acid, was also tested (5,0 ; 0,4 HF; 2,5 BO ). Pyrolytically coated tubes, equipped with integrated or L'vov platfoms, GFAAS. Palladium-magnesium nitrate as matrix modifier. Several reference materials (e.g. humus, moss, lichen, sea lettuce) analyzed.