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Colorimetric detection of trace Hg2+ with near-infrared absorbing squariane functionalized by dibenzo-18-crown-6 and its mechanism

yanzhengquan 添加于 2017/2/2 10:39:09  185次阅读 | 0次推荐 | 0个评论

In this contribution, an improved near-infrared absorbing colorimetric detection of Hg2+ ion with high selectivity and sensitivity had been developed by using bis-dibenzo-18-crown-6-based squaraine (BCSQ) as sensor in aqueous media. The proposed method was applied to analyze trace Hg2+ in synthetic Hg2+ samples and natural Hg2+ samples. Under the optimum conditions, the detection had a linear range of 7.5–150  108 mol L1 with a correlation coefficient (R) of 0.9983 combining a limit detection (3r, n = 20) of 5.6  109 mol L1. The relative standard deviation (RSD) was lower than 2.4% (n = 5). The proposed method possesses the advantages of simplicity, rapidity, high selectivity and sensitivity. The action mechanism between BCSQ and Hg2+ was discussed in details.

作 者:Lei Hu, Yafei Zhang, Li Nie, Chenggen Xie, Zhengquan Yan*
期刊名称: Spectrochim. Acta, Part A
期卷页: 2013 第104卷 第期 87-89页
学科领域:化学科学 » 分析化学 » 光谱分析
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