A new highly sensitive solid substrate room temperature phosphorimetry for the determination of trace titanium is proposed based on the sensitization of Triton X-100 to the SS-RTP intensity of 4,5-dibromophenylfluoron...A new highly sensitive solid substrate room temperature phosphorimetry for the determination of trace titanium is proposed based on the sensitization of Triton X-100 to the SS-RTP intensity of 4,5-dibromophenylfluorone-titanium complex adsorbed on the filter paper substrate modified by gelatin. When Triton X-100 was added into the luminescence system, the RTP intensity was raised 3 times stronger than that of the system without Triton X-100. The linear dynamic range of the new method is 0 64~3 2 fg/spot(0 4 μL) with a detection limit of 12 8 ag/spot, and the regression equation of the working curve is Δ I p =482 0+119 5 m Ti(Ⅳ) (fg/spot), the correlation coefficient r =0 9992, n =6. The phosphorescence lifetime( τ =0 85 ms) was also determined. The recoveries(and RSD) for the determinations of titanium in human hair and tea samples were 101 0%(3 0%) and 99 97%(4 2%), respectively.展开更多
基金Supported by the National Natural Science Foundation of China( No.2 0 175 0 11) and the Natural Science Foundation ofFujian Province( No.C0 110 0 2 8)
文摘A new highly sensitive solid substrate room temperature phosphorimetry for the determination of trace titanium is proposed based on the sensitization of Triton X-100 to the SS-RTP intensity of 4,5-dibromophenylfluorone-titanium complex adsorbed on the filter paper substrate modified by gelatin. When Triton X-100 was added into the luminescence system, the RTP intensity was raised 3 times stronger than that of the system without Triton X-100. The linear dynamic range of the new method is 0 64~3 2 fg/spot(0 4 μL) with a detection limit of 12 8 ag/spot, and the regression equation of the working curve is Δ I p =482 0+119 5 m Ti(Ⅳ) (fg/spot), the correlation coefficient r =0 9992, n =6. The phosphorescence lifetime( τ =0 85 ms) was also determined. The recoveries(and RSD) for the determinations of titanium in human hair and tea samples were 101 0%(3 0%) and 99 97%(4 2%), respectively.
