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在阳离子表面活性剂存在下 ,依据Ti(IV) - 2 ,3,7-三羟基 - 9- (3,5-二溴 - 2 -羟基 )苯基荧光酮 (简称DBSPF)体系的荧光熄灭效应 ,拟定了一种采用荧光法测定微量钛的新分析方法 在pH5 2～ 6 8的HAc-NaAc缓冲溶液介质中 ,钛 (IV)与DBSPF形成 1 :3的无荧光络合物 试剂最大激发波长和发射波长分别为 362nm和 559nm 钛 (IV)含量在 5 0 μg/Ll范围内 ,钛浓度与荧光熄灭量呈现良好的线性关系 ,方法检测线为 (0 1～2 4) μg/ 2 5ml 拟定方法用于合金钢中微量钛的测定 ,结果满意
Fluorescence quenching effect of Ti (IV) -2, 3,7-trihydroxy-9- (3,5-dibromo-2-hydroxy) phenylfluorone (DBSPF) system in the presence of cationic surfactants , A new analytical method for the determination of trace titanium by fluorescence spectrometry was developed. In the HAc-NaAc buffer solution with pH5 2 ~ 6 8, the maximum excited wavelength of 1: 3 non-fluorescent complex reagent between titanium (IV) and DBSPF The results showed that there was a good linear relationship between the concentration of titanium and the amount of fluorescence quenching when the content of titanium (IV) was 362 nm and 559 nm, respectively. The detection limit of this method was (0 1 ~ 2 4) μg / 2 5ml The method was applied to the determination of trace titanium in alloy steel with satisfactory results