化学学报 ›› 1990, Vol. 48 ›› Issue (3): 256-261. 上一篇    下一篇

研究论文

钯-柠檬黄-表面活性剂荧光光度法的研究与应用

文志明;王怀公   

  1. 兰州大学化学系
  • 发布日期:1990-03-15

Fluorimetric reaction of palladium (II) with tartrazine and surfactants and its application

WEN ZHIMING;WANG HUAIGONG   

  • Published:1990-03-15

本文研究了在各种类型的表面活性剂存在下, 钯与柠檬黄的胶束增敏荧光反应, 测定了金属荧光配合物的形成条件、组成、量子产率、表观稳定常数和激发波长处的摩尔吸光系数, 对胶束增敏作用机理进行了初步探讨. 确定了测定钯的最佳条件, 钯在0.1-8.0μg/25mL 范围内与荧光强度呈线性关系, 检出下限达8.0x10^-^4μg/mL. 本文方法可不经分离直接快速地测定贵金属矿样中痕量钯,结果令人满意。

关键词: 表面活性剂, 反应机理, 钯, 钯, 荧光分光光度法, 酒石黄, 增敏作用, 溴化十六烷基三甲铵

The sensitization of various surfactants on the fluorometric reaction of Pd(II) and food color Tartrazine (TTZ) was compared. Cetyltrimethylammonium bromide (CTMAB) is the best one. The mechanism of sensitization of different surfactants for fluorometric reaction of the 1:2 Pd(II)-TTZ complex is discussed. The role of the cationic surfactants in the micellar fluorescent reaction was due to the ion-assocn. interactions and the protective actions of the micelles. The optimum conditions of fluorometric determination of Pd(II) was established. The sensitivity of the reaction increases 6-fold in the presence of CTMAB. The limit of determination is 8.0 ?10-4 mg/mL. Calibration curve is linear for 0.1-8.0 Pd mg/25 mL. Pd was determine in slags and Pd concs. with satisfactory results.

Key words: SURFACTANTS, REACTION MECHANISM, PALLADIUM, PALLADIUM, FLUOROSPECTROPHOTOMETRY, TARTRAZINE, SENSITIZING

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