基于安卓手机的手持漫透射水质检测管比色系统的研究与应用

Research and Application of Handheld Colorimetric System for Diffuse Transmission Water Quality Detection Tube Based on Android Phone

为满足现场快速监测需要,研发了基于安卓手机的手持式漫透射水质检测管比色系统,采用了可靠的光源和光路设计,利用3D打印技术制作了与手机适配的附件,实现了塑封挤压吸入式水质检测管测定结果的机器准确快速直读。系统可自动对不同检测项目筛选响应值计算数学模型以获取最佳线性关系的工作曲线。采用氨氮标准物质和环境样品进行验证实验,工作曲线线性相关系数为0.9991,对0.50 mg·L^(-1)标样进行7次重复测定,相对标准偏差为2.68%,检出限为0.08 mg·L^(-1),对工业污水进行加标回收实验,回收率为99%~100%。采用相同的方法同时对COD、Cr^(6+)、Cu、Fe、Mn、F^(-)、PO^(3-)_(4)等7个项目进行了实验,7个项目的工作曲线线性相关系数分别为0.9968、0.9998、0.9992、0.9995、0.9974、0.9993、0.9992。该研究在环境水质快速检测中具有较高实用价值。

In order to meet the needs of on-site rapid monitoring,this article has developed a handheld colorimetric system for diffuse transmission water quality detection tube based on Android mobile phones.It adopts a reliable light source and optical path design,and uses 3D printing technology to create accessories that are compatible with the mobile phone,achieving accurate and fast machine reading of the measurement results of the plastic sealed extrusion suction water quality detection tube.The system can automatically select the response value calculation mathematics mathematical model for different test items to obtain the working curve of the best linear relationship.Validation experiments were conducted using ammonia nitrogen standard substances and environmental samples.The linear correlation coefficient of the work curve was 0.9991.Seven repeated measurements were performed on a 0.50 mg·L^(-1)standard sample,with a relative standard deviation of 2.68%and a detection limit of 0.08 mg·L^(-1).The recovery rate of industrial wastewater was 99%~100%.Using the same method,experiments were conducted on 7 items including COD,Cr^(6+),Cu,Fe,Mn,F^(-),and PO_(4)^(3-)simultaneously.The linear correlation coefficients of the work curves of the 7 items were 0.996,0.9998,0.9992,0.9995,0.9974,0.9993,and 0.9992,respectively.This research has high practical value in rapid detection of environmental water quality.