石墨炉原子吸收光谱法测定加氢催化剂中的痕量砷

DETERMINATION OF THE TRACE ARSENIC IN HYDROGENATION CATALYST BY GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

建立了石墨炉原子吸收法直接测定加氢催化剂中痕量砷的方法,并研究了测定条件和消解方法。样品催化剂经HNO3-HClO4消解处理后,以Ni作为基体改进剂,用偏振塞曼效应扣去背景法测定其中的砷。砷的检出限为0.00048mg/L,样品测定结果的相对标准偏差小于2.2%(n=10),回收率为98%～101%。

A method for determining the trace As in hydrogenation catalyst by graphite furnace atomic absorption spectrometry was established.The determination conditions and digesting method were also explored.After the catalyst samples were solved by HNO 3-HClO 4,As was determined by the background correct with zeemaan effect,with Ni as maxtrimodifer.The detection limit was 0.000 48 mg/L,and the recoveries were in the range of 98% to 101%.The relative standard deviation was less than 2.2%(n =10).