Abstract: This paper is on the enrichment of trace europium, desorption condition and the interference during measurement. The results have shown that proper amount of Fe²⁺ is essential for quantitative analysis of Eu³⁺. The sensitivity and reproducibility can be guaranteed through techniques of graphite tube with tantalum-dipped thermo coating and photo-thermo control. The method is simple, accurate and reproducible for the measurement of rocks and minerals in big lots with Eu₂O₃>1×10^-5%.