研究目的
Simultaneous determination of Hg2+, Fe3+ and Cu2+ in environmental water samples on site using a smartphone-based three-channel ratiometric fluorescence device.
研究成果
The smartphone-based three-channel ratiometric fluorescent device demonstrated effective simultaneous determination of Hg2+, Fe3+ and Cu2+ in water samples on site. The device offers advantages of portability, sensitivity, and reliability for field analysis.
研究不足
The study does not mention the device's performance under extreme environmental conditions or its applicability to other metal ions beyond Hg2+, Fe3+, and Cu2+.
1：Experimental Design and Method Selection:
The study utilized a smartphone-based three-channel ratiometric fluorescence device for the simultaneous determination of Hg2+, Fe3+ and Cu2+. The method was based on the fluorescence quench mechanism of these ions to three kinds of doped carbon quantum dots.
2：2+. The method was based on the fluorescence quench mechanism of these ions to three kinds of doped carbon quantum dots.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Water samples were collected from Xiaoqing River (Jinan, China) and detected at the scene. Samples were filtered and pretreated before analysis.
3：List of Experimental Equipment and Materials:
A smartphone (Huawei Glory 7), a 365 nm LED flashlight, a specially designed three-channel cuvette, and doped carbon quantum dots prepared from ammonium citrate, citric acid + 1,10-phenanthroline, and EDTA + thiourea.
4：Experimental Procedures and Operational Workflow:
The fluorescent images of the six detection areas were captured by the smartphone's camera. The brightness of the fluorescent images was analyzed using user-edited APP software.
5：Data Analysis Methods:
A multivariate calibration method was used to correct the mutual interference among Hg2+, Fe3+ and Cu2+.
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