【摘要】 用荧光猝灭法研究了二溴羟基苯基荧光酮（Ｔｉ（Ⅳ）－ＤＢＨ－ＰＦ－Ｔｒｉｔｏｎｘ－１００）体系的测定方法与条件。在ｐＨ为１．５～２．１的Ｈ２ＳＯ４介质中Ｔｒｉｔｏｎｘ－１００存在下，Ｔｉ（Ⅳ）与ＤＢＨ－ＰＦ形成１∶２的桔红色络合物。钛浓度在０．０１～４μｇ／２５ｍＬ范围内ΔＦ与钛浓度呈良好的线性关系，相关系数ｒ＝０．９９８８，检量限为０．４ｎｇ／ｍＬ。方法灵敏度高，选择性好。该方法用于硅酸盐矿物如水泥、硅质砂岩、粘土和石灰岩中微量钛的测定获得了满意的结果更多还原

【Abstract】 In this paper,the conditions of the reaction of Ti(Ⅳ) with DBH-PF was studied by fluoresence quenching method in the presence of surfactant Tritonx-100 and pH=1 5～2 1 H 2SO 4 medium.The method has been used to determine trace amounts Ti(Ⅳ) in silicate minerals with high sensitivity and satisfied rusults.Its linear range covers 0 01～4μg/25mL of analysed solution,with correlation coefficient r =0 9988 and detection limit being 0 4ng/mL.更多还原