Young Song
School of Pharmaceutical Sciences, Hunan University of Chinese Medicine, Changsha, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Nov;68(3):705-9. doi: 10.1016/j.saa.2006.12.049. Epub 2007 Jan 5.
A dye intermediate, 1-amino-8-naphthol-3,6-disulfonic acid sodium (ANDS) was first used to selectively recognize Hg(II) in aqueous solutions with its fluorescence being strong quenched. The fluorescence quenching of ANDS was attributed to the formation of an inclusion complex between Hg(II) and ANDS by 2:1 complex ratio (K=6.2 x 10(9)), which has been utilized as the basis of the fabrication of the Hg(II)-sensitive fluorescent chemosensor. The analytical performance characteristics of the proposed chemosensor were investigated. The sensor shows a linear response toward Hg(II) in the concentration range 2.9 x 10(-6) to 5.5 x 10(-5)M with a limit of detection of 5.3 x 10(-7)M, and a working pH range from 5.0 to 9.0. It shows excellent selectivity for Hg(II) over a large number of cations such as alkali, alkaline earth and transitional metal ions. The proposed method was utilized successfully for the detection of Hg(2+) in water samples.
一种染料中间体，1-氨基-8-萘酚-3,6-二磺酸钠（ANDS）首次被用于在水溶液中选择性识别Hg(II)，其荧光被强烈猝灭。ANDS的荧光猝灭归因于Hg(II)与ANDS以2:1的络合比形成包合物（K = 6.2×10⁹），这已被用作制备对Hg(II)敏感的荧光化学传感器的基础。研究了所提出的化学传感器的分析性能特征。该传感器在2.9×10⁻⁶至5.5×10⁻⁵ M的浓度范围内对Hg(II)呈现线性响应，检测限为5.3×10⁻⁷ M，工作pH范围为5.0至9.0。它对Hg(II)表现出优于大量阳离子（如碱金属、碱土金属和过渡金属离子）的优异选择性。所提出的方法成功用于检测水样中的Hg²⁺。
