原子吸收分光光度法测定石油裂解催化剂中的钠,铁和铜

本文研究了石油裂解催化剂中钠、铁和铜的测定。试样用氢氟酸和高氯酸(或硫酸)溶解后,控制溶液酸度在pH1.5-2.0范围内,分别在5589.0纳米,248.3纳米,324.8纳米波长处对钠、铁和铜进行原子吸收分光光度法测定。其相对标准偏差分别小于5%,4%和2%;回收率分别在96-101%,94-103%和97-104%之间,适合于石油裂解催化剂的分析。

Determination of Sodium, Iron and Copper in Petroleum Cracking Catalyst by Atomic Absorption Spectrophotometry

The determination of sodium, iron and copper in petroleum cracking catalyst was investigated in this paper. After catalyst samples were dig ested by HF and HClO_4 (or H_2SO_4), acidity of solution was controlled in the range of pH 1.5-2.0, then contents of sodium, iron and copper were determined at the wavelength of 589.0, 248.3, and 324.8nm respecti vely by AAS. RSD of Na, Fe and Cu were less than 5%, 4% and 2% respectively; and recoveries were 96-101%, 94-103%, and 97-104% respectively.