汞(Ⅱ)荧光薄膜传感器的制备及性能研究

Preparation and performance of a fluorescent film sensor for Hg^(2+)

为实现对Hg^(2+)的快速检测,以罗丹明B为识别基团,设计并合成了一种Hg^(2+)荧光薄膜传感器,其与Hg^(2+)络合后荧光显著增强。随着Hg^(2+)浓度的不断升高,荧光薄膜传感器在550 nm处的吸收逐渐增强。同时,在0.1"0.9μmol/L Hg^(2+)浓度范围内,580 nm处荧光强度与Hg^(2+)浓度呈良好的线性关系(R=0.990 8)。荧光薄膜传感器对Hg^(2+)的检测限为4.3 pmol/L,常见的其他8种金属离子的存在对Hg^(2+)的检测无明显干扰。该方法便捷、快速、灵敏度高,可用于水溶液中Hg^(2+)的痕量检测。

In order to detect Hg^（2＋） rapidly,rhodamine B was used as recognition group to synthesize novel fluorescent film sensor.The intensity（ at 580 nm） and the absorption（ at 550 nm） of fluorescent probe 1 increased significantly after the addition of Hg^（2＋） .A good linear fitting between the fluorescent intensity（ at 580 nm） and the concentration of Hg^（2＋） from 0.1 to 0.9 μM was observed.A low detection limit of Hg^（2＋） at 4.3 pmol / L was achieved.The detection of Hg^（2＋） ion was not affected by the presence of other common ions.It could be used to detect trace Hg^（2＋） in water solutions because of its convenience,speediness and high-sensitivity.