【摘要】 制备了一种高灵敏的水溶性荧光共轭聚合物(PPE-OBS),将其用于苦味酸的荧光检测.利用质谱、核磁共振波谱和红外光谱等方法对PPE-OBS进行了表征,并对其检测苦味酸的条件进行了优化.结果表明,在硼酸-氢氧化钠缓冲溶液(pH=9.5)中作用20 min,苦味酸对PPE-OBS荧光的猝灭效率最大.在最优条件下,PPE-OBS检测苦味酸的线性范围为1.0~60μmol/L(R~2=0.999),检出限为0.831μmol/L(S/N=3).将PPEOBS制成荧光试纸用于检测环境样品中的苦味酸,获得了较好的检测结果.更多还原

【Abstract】 A water soluble conjugated polymer {poly[2,5-bis(sodium 4-oxybutyrate)-1,4-phenylethynylene-alt-1,4-phenyleneethynylene],PPE-OBS},was synthesized for the detection of picronitric acid(PA).PPE-OBS was characterized by means of mass spectrometry,NMR spectroscopy,infrared spectroscopy(IR),and so on.The experiment conditions and detection performance of PPE-OBS were systematically studied.The results show that the fluorescent quenching of PPE-OBS is the most efficient when the reaction time between PPE-OBS and PA is 20 min in the boric acid-sodium hydroxide buffer solution(pH=9.5).The results demonstrate that PPE-OBS as a sensor for PA has a good linear range from 1.0 to 60 μmol/L with the calculated limit of detection(LOD) to be 0.831 μmol/L.Meanwhile,PPE-OBS paper was applied to rapidly detecting PA in environmental water samples.更多还原