Determination of Poly-L-lysine with a Water-soluble Fluorescence Polymer

Abstract

Abstract: A water-soluble fluorescence polymer poly[5-methoxy-2-(3-sulfopropoxy)-1,4-phenylene-vinylene](MPS-PPV) was synthesized and characterized by elemental analysis, infrared absorption spectrun and the transmission electron microscope micrograph. The fluorescence of MPS-PPV could be quenched by poly-L-lysine(PLL), a new food preservative. So a rapid and sensitive method for the determination of PLL was set up, the linear range and detection limit were 3.6×10^-92.5×10^-8 mol/L and 5.0×10^-10 mol/L respectively. The fluorescence quenching mechanism of PLL to MPS-PPV was also discussed, which was caused by the strong electrostatic interaction between cationic PLL and anion conjugated polymer MPS-PPV.

Key words: Fluorescence, Polymer, Poly[5-methoxy-2-(3-sulfopropoxy)-1,4-phenylenevinylene], Poly-L-lysine

CLC Number:

O625

TrendMD:

CHEN Yan-Guo, HE Zhi-Ke . Determination of Poly-L-lysine with a Water-soluble Fluorescence Polymer[J]. Chem. J. Chinese Universities, 2005, 26(8): 1428.

References

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