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以荧光衍生光谱法研究了氯化钡与玫红酸形成络合物的荧光光谱,建立了钡离子的荧光光谱分析方法,在优化条件下:溶液pH=11.2,反应时间为5min,乙醇与水溶剂的比为15%。在2.5×10-11—5×10-5mol/L范围内,络合物的荧光强度与钡离子浓度存在两段线性关系,检出限为2.5×10-11mol/L。方法用于钡餐在水中溶解度的测定,结果与文献报道值一致。
Fluorescence spectrometry was used to study the fluorescence spectra of the complex between barium chloride and rosmarinic acid. Fluorescence spectra of barium ions were established. Under optimized conditions, pH = 11.2, reaction time 5min, ethanol and water The solvent ratio is 15%. In the range of 2.5 × 10-11-5 × 10-5mol / L, there was a linear relationship between the fluorescence intensity of the complex and the concentration of Ba2 +, with a detection limit of 2.5 × 10-11mol / L. The method was used to determine the solubility of barium meal in water. The results were consistent with those reported in the literature.