Determination of Trace Titanium by Solid Substrate-Room Temperature Phosphorimetry with 4,5-Dibromophenylfluorone as Luminescent Ligand and Triton X-100 as Sensitizer

Chemical Research in Chinese Universities ›› 2003, Vol. 19 ›› Issue (4): 395-398.

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Determination of Trace Titanium by Solid Substrate-Room Temperature Phosphorimetry with 4,5-Dibromophenylfluorone as Luminescent Ligand and Triton X-100 as Sensitizer

LIU Jia-ming¹, YANG Tian-long¹, YAN Hai-gang¹, SHEN Li-shuang¹, LI Long-di²

1. Department of Chemistry, Zhangzhou Teacher College, Zhangzhou 363000, P. R. China;
2. Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China

Received:2002-08-20 Online:2003-12-24 Published:2011-08-06
Supported by:
Supported by the National Natural Science Foundation of China(No.20175011) and the Natural Science Foundation of Fujian Province(No.C0110028).

Abstract

Abstract: 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 ΔI_p =482.0+119.5m_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.

Key words: Titanium, 4,5-Dibromophenylfluorone, Solid substrate room temperature phosphorimetry, Sensitization by Triton X-100

LIU Jia-ming, YANG Tian-long, YAN Hai-gang, SHEN Li-shuang, LI Long-di. Determination of Trace Titanium by Solid Substrate-Room Temperature Phosphorimetry with 4,5-Dibromophenylfluorone as Luminescent Ligand and Triton X-100 as Sensitizer[J]. Chemical Research in Chinese Universities, 2003, 19(4): 395-398.

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Determination of Trace Titanium by Solid Substrate-Room Temperature Phosphorimetry with 4,5-Dibromophenylfluorone as Luminescent Ligand and Triton X-100 as Sensitizer

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