引用本文:
王诗彤, 贺洋洋, 熊细鸿, 张维, 夏美琳, 唐凤琳. 基于手机RGB图像-微信小程序的化学需氧量(COD)实时可视化快速分析[J]. 大学化学,
2026, 41(1): 394-405.
doi:
10.12461/PKU.DXHX202506011
Citation: Shitong Wang, Yangyang He, Xihong Xiong, Wei Zhang, Meilin Xia, Fenglin Tang. 基于手机RGB图像-微信小程序的化学需氧量(COD)实时可视化快速分析[J]. University Chemistry, 2026, 41(1): 394-405. doi: 10.12461/PKU.DXHX202506011
Citation: Shitong Wang, Yangyang He, Xihong Xiong, Wei Zhang, Meilin Xia, Fenglin Tang. 基于手机RGB图像-微信小程序的化学需氧量(COD)实时可视化快速分析[J]. University Chemistry, 2026, 41(1): 394-405. doi: 10.12461/PKU.DXHX202506011
基于手机RGB图像-微信小程序的化学需氧量(COD)实时可视化快速分析
摘要:
化学需氧量(COD)是表征水体有机污染程度的关键指标，也是一项常规分析项目。本文基于HJ/T399-2007《水质化学需氧量的测定快速消解分光光度法》的标准方法，创新性地开发了一种基于智能手机RGB图像-微信小程序的COD实时可视化快速分析检测系统。采用智能手机的色彩识别功能提取经消解后水样图像的RGB值，并基于RGB建立三元多次回归数学模型，开发微信小程序对COD进行在线可视化分析，实现了智能手机对大批量水样COD的现场快速简便测定。该方法具有操作简单、成本较低、快速测定的优点。教学实践表明，该技术不仅适用于环境监测领域，还能有效促进分析化学实践教学，能够促进本科户外教学活动的开展，激发学生的化学学习兴趣，启迪其科学思维与创新意识，培养科学态度。
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关键词:
- 化学需氧量(COD)
- / RGB值
- / 智能手机
- / 微信小程序开发
English
基于手机RGB图像-微信小程序的化学需氧量(COD)实时可视化快速分析
Abstract:
Chemical oxygen demand (COD) serves as a crucial parameter for assessing organic pollution in water and represents a routine analytical requirement. Building upon the standard method HJ/T399-2007 (“Water Quality-Determination of Chemical Oxygen Demand-Rapid Digestion Spectrophotometric Method”), this study innovatively developed a smartphone-based real-time visual detection system for COD analysis. The system utilizes smartphone color recognition to extract RGB values from digested water samples and establishes a ternary multiple regression model based on these values. A dedicated WeChat mini-program was developed to enable online visualization and analysis of COD, facilitating rapid on-site measurement of multiple water samples. This approach demonstrates advantages including operational simplicity, cost-effectiveness, and rapid analysis. Educational practice has shown that this technology not only finds application in environmental monitoring but also effectively enhances analytical chemistry pedagogy. It promotes outdoor teaching activities for undergraduates, stimulates students’ interest in chemistry, fosters scientific thinking and innovation awareness, and cultivates rigorous scientific attitudes.
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Key words:
- Chemical oxygen demand (COD)
- / RGB value
- / Smartphone
- / WeChat mini-program development
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