1 引 言 稀土元素共发光效应的研究已有许多报道,其研究体系主要集中于钐、铕-β-二酮荧光体系,β-二酮中以噻吩甲酰三氟丙酮研究得最为详尽,协同配体大多采用三辛基氧化膦,邻菲咯啉等。本文研究了钐、铕-二苯甲酰甲烷(DBM)荧光体系,在表面活性剂十六烷基三甲基溴化铵(CTMAB)及Triton X-100存在下,形成钐或铕-DBM-CTMAB三元离子缔合络合物。当于上述体系中加入Gd~(3+)后,荧光强度大大增加,约比无Gd存在时提高50倍.并用多点增量法同时测定了稀土氧化物中痕量的钐和铕,结果令人满意。 1 Introduction Many studies have been reported on the co-luminescent effect of rare earth elements. The research system is mainly focused on the samarium, europium-β-diketone fluorescent system, and the study of the so-benzoyltrifluoroacetone in β-diketone is the most detailed and synergistic Mostly used trioctyl phosphine oxide, phenanthroline and so on. In this paper, the samarium and europium-dibenzoylmethane (DBM) fluorescent systems were studied in the presence of surfactant cetyltrimethylammonium bromide (CTMAB) and Triton X-100 to form samarium or europium-DBM- CTMAB ternary ion association complex. When Gd ~ (3+) was added to the above system, the fluorescence intensity increased greatly, which was about 50 times higher than that in the absence of Gd. The simultaneous determination of trace amounts of samarium and europium in rare earth oxides by multi-point incremental method showed that Satisfactory.