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中文摘要：
利用含磺酸基侧链的聚苯乙炔类共轭聚电解质PPESO，作为荧光探针检测小檗碱，由于磺酸基阴离子侧链与小檗碱的季铵阳离子之间的静电相互作用形成了复合物，导致了PPESO，荧光信号显著地猝灭。在优化条件下．采用该方法检测小檗碱的线性范围为7．5×10-8mol／L-4．0×10-6mol／L，检出限为8．7×10-9mol／L（S／N=3）。
英文摘要：
A fluorescent probe was developed for the detection of berberine based on a conjugated polyelectrolyte （PPESO3） containing a poly （phenylene ethynylene） backbone and anionic sulfonate side groups. The fluorescence of PPESO3 was efficiently quenched by berberine through the formation of non-fluorescent complex due to the electrostatic interactions between sulfonate anions of PPESO3 and quaternary ammonium cations of berberine. Under the optimum conditions, the method for berberine detection exhibits a good linear relationship in the range of 7.5 × 10-8 mol/L to 4.0× 104 mol/L with a detection limit of 8.7 × 10-9 mol/L （S/N=3）.
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