论文部分内容阅读
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.
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 was 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 ΔI p = 482 0 + 119 5 m Ti (Ⅳ) (fg / spot), the correlation coefficient r = 0 The recoveries (and RSD) for the determinations of titanium in human hair and tea samples were 101 0% (3 0%) and 99 97%. The phosphorescence lifetime (τ = 0 85 ms) was also determined. (4 2%), respectively.