智能手机光学检测技术用于检测水体中污染物的研究

数字图像比色法(Digital Image Colorimetry,DIC)作为一种传感器方法具有简易、灵敏、成本低廉的优点,广泛应用于环境监测、化学及生物化学等领域。以LED面光源作为数字图像比色法的光源对六价铬水样进行了检测,显色反应后的溶液通过手机免费软件获取R(红)、G(绿)、B(蓝)颜色值。由于RGB模型为非均匀的颜色参数,故把R、G、B值转化为不同的数学模型,并比较各种数学模型所得出的标准曲线的线性相关性,其中灰度吸光度模型的线性相关系数最高(R~2=0.999 2)。检测方法的线性范围为0.02～1.0mg/L,检出限为0.006mg/L,加标回收率为96.5%～107%,方法具有简便快捷、灵敏度高,适用于快速现场检测。

Research on the use of smart phone optical detection technology to detect pollutants in water

As a sensor method, Digital Image Colorimetry (DIC) has the advantages of simplicity, sensitivity?and low-cost, and it is widely used in environmental monitoring, chemical, biochemical and other fields. We used the LED surface light source as the light source of the digital picture colorimetric method to detect the hexavalent chromium of water sample, The solution after the color reaction reaction obtained the R (red), G (green) and B (blue) color values through the free software of the mobile phone. Since the RGB model is a non-uniform color parameter, we convert the R, G, and B values into different mathematical models, and compare the linear correlations of the standard curves obtained by various mathematical models, where the linear correlation of the gray-scale absorbance model is the highest (R2=0.9992), and the correlation coefficient can be compared with the national standard method. The linear range of the detection method is 0.088-1.0mg/L, the detection limit is 0.026mg/L, and the spike recovery is 96.5~107.0%. The method is simple, rapid and sensitive, and is suitable for rapid on-site detection..