研究了镝（Ⅲ）－１，１０－双（１′－苯基－３′－甲基－５′－氧代吡唑－４′－基）癸二酮－［１，１０］（ＢＰＭＰＤＤ）－溴化十六烷基三甲胺（ＣＴＭＡＢ）体系的荧光性质，探讨了体系的组成比及影响体系荧光性质的多种因素，拟定了应用该体系测定Ｄｙ（Ⅲ）的新方法，在２０×１０－６～４０×１０－９ｍｏｌ·Ｌ－１范围内Ｄｙ（Ⅲ）浓度与荧光强度呈线性关系，检测限为３３×１０－１０ｍｏｌ·Ｌ－１．将该法应用于合成样品中微量Ｄｙ（Ⅲ）的测定，结果满意 Dysprosium (Ⅲ) -1,10-bis (1’-phenyl-3’-methyl-5’-oxopyrazol-4’-yl) (CTMAB) system, the compositional ratio of the system and the various factors affecting the fluorescence properties of the system were discussed. A new method for the determination of Dy (Ⅲ) The linear relationship between the concentration of Dy (Ⅲ) and the fluorescence intensity was found in the range of 0 × 10-6 ~ 40 × 10-9 mol·L-1 with the detection limit of 3 × 10-10 mol·L-1. The method was applied to the determination of trace Dy (Ⅲ) in synthetic samples with satisfactory results