泡塑富集-石墨炉原子吸收光谱法测定痕量金

THE DETERMINATION OF TRACE AU BY GFAAS AFTER PRECONCENTRATION WITH POLYURETHANE FOAM

介绍在Fe3+存在下,用泡沫塑料分离富集,以抗坏血酸和硝酸铵为基体改进剂,采用斜坡升温和长寿命石墨管技术进行化探样品中痕量金的石墨炉原子吸收光谱法测定方法。该方法已应用于化探样品中金的分析工作中,取得了令人满意的结果。

The determination method of trace Au in geochemical exploration sample, ie, the graphite furnace atomic absorption spectrometry （SFAAS） methed after preconcentration with polyurethane foam, is interpreted in this paper. The trace Au is absorbed with polyurethane foam under the presence of Fe^ ＋3. The Au is determined by SFAAS with ascorbic and ammonium nitrate as the matrix modifier. This method has been applied to the analysis of Au in the geochemical exploration sample and the result is satisfactory.