研究目的
Development of a low-cost on-paper sensor for selective cyanide detection in aqueous solutions using a smartphone for colorimetric analysis.
研究成果
The developed CoTTCorr(PPh3)-based optical sensor on a paper support, coupled with a smartphone for colorimetric analysis, provides a low-cost, selective, and sensitive method for cyanide detection in aqueous media. The sensor's performance, with a detection limit of 0.053 mg/L, is suitable for monitoring cyanide levels in potable water and saliva, offering a practical solution for field analysis.
研究不足
The study's limitations include the potential for visual interpretation errors due to environmental lighting and observer variability, and the need for optimization of the ionophore/exchanger ratio to achieve lower detection limits.
1：Experimental Design and Method Selection:
The study involved the development of a paper-based optode using CoTTCorr(PPh3) for cyanide detection. The methodology included UV-vis spectroscopy for sensitivity studies and smartphone-based colorimetric analysis for real-time detection.
2：Sample Selection and Data Sources:
Aqueous solutions of KCN were used for calibration, and real samples included potable water and saliva from volunteers.
3：List of Experimental Equipment and Materials:
CoTTCorr(PPh3), TDACl, DMSO, THF, TBACN, MES, various sodium salts for anions, Whatman filter paper, smartphone, and Matlab software for image analysis.
4：Experimental Procedures and Operational Workflow:
Sensing spots were prepared on filter paper, exposed to cyanide solutions, and color changes were recorded using a smartphone. The images were analyzed using custom Matlab codes to quantify cyanide concentration.
5：Data Analysis Methods:
Optical intensities in RGB space were analyzed to construct calibration curves and determine cyanide concentrations in samples.
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