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| Rapid Determination of Perchlorate Concentration in Environmental Water Based on Smartphone |
| Received:July 11, 2023 Revised:January 05, 2024 |
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| DOI：10.3969/j.issn.2095-1035.2024.04.001 |
| KeyWord:Perchlorate; Digital images; Methylene blue complexation; Smartphone |
| Author | Institution |
| CHEN Peiyu |
湖南农业大学 环境与生态学院 |
| LUO Lin |
湖南农业大学 环境与生态学院 |
| YANG Yuan |
湖南农业大学 环境与生态学院 |
| Bing mingjie |
湖南农业大学 |
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| Abstract: |
| Perchlorate is a typical persistent inorganic pollutant that is difficult to degrade in the aquatic environment, with high water solubility and diffusivity. Perchlorates in surface water and groundwater can be stored in food and drinking water in various ways, posing a serious threat to human health. In response to the problems of complex operation, long detection cycle, high cost, and inconvenient real-time detection of traditional perchlorate detection technology, this article proposes a new method for rapid determination of perchlorate content using smartphone, fully leveraging its advantages of simple, accurate, and fast on-site detection of water perchlorate. In this study, a digital image colorimetric device constructed by 3D printing box, diffusion plate, fill light and smart phone was used to achieve rapid detection of perchlorate concentration in water. The effects of mobile phone model, light source and interfering ions on the R (red), G (green) and B (blue) values of the digital image colorimetric device were discussed. The results showed that when the R-channel digital signal value was taken as the determination value, the perchlorate showed a good linear relationship in the concentration range of 0 μg/L ~ 600 μg/L. The linear equation was y=-0.1505 x+150.66, the correlation coefficient was R2=0.995, and the recovery rate was 96~107%. The limit of detection was 27.7 μg/L and the limit of determination was 88 μg/L. Two sets of actual water samples with different concentrations of perchlorate were tested using white light and iPhone 11 to explore reproducibility. The relative standard deviation of the test results was only 3.2% to 4.0%, and the sample recovery rate ranges from 95% to 107%. This method has certain feasibility and accuracy, and provides a new idea for the on-site rapid determination of perchlorate in water. |
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