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本文报道用原子吸收分光光度法测定稀土磷酸盐催化剂中助剂铜,不必经过萃取、分离等其它过程,而用酸溶处理后,在空气一乙炔燃焰中,直接测定微量铜的方法。结果表明:无论采用标准曲线法还是标准加入法测得的铜含量基本相同。在本工作确定的实验条件下,磷酸稀土背景对分析结果的影响可以忽略不计,而方法的准确度、精密度均在0.1～1.8%、0.0～1.2%之间。
In this paper, the method of atomic absorption spectrophotometry for the determination of Cu in Rare-earth phosphate catalysts without the need of extraction, separation and other processes, and the use of acid treatment, the method of direct determination of trace Cu in air-acetylene flame combustion. The results show that the copper content is basically the same regardless of the standard curve method or the standard addition method. Under the experimental conditions determined in this work, the effect of rare earth phosphate on the analytical results is negligible, and the accuracy and precision of the method are in the range of 0.1-1.8% and 0.0-1.2% respectively.