基于智能手机的便携式多功能食品安全快检系统开发OACSTPCD

In order to address the low degree of integration and poor portability of current food safety rapid detection systems,this study focused on the rapid quantitative detection of ractopamine by using smartphones as the detection tool and employing the digital image colorimetric method.To accurately obtain the image information of the test strip and microplate,a portable image collection device with a fixed shooting environment was designed and the Fresnel lens,which can converge the light,was used.The image processing algorithm based on OpenCV and smartphone application were designed to achieve automatic identification of the reaction area of test strip and microplate and analysis of color features on mobile terminals.The results showed that:1)The image collection device designed in this study can accurately image the test strip and microplate(CV＜3％);2)The color feature values are logarithmically related to the concentration of ractopamine rapidly detected using the GICT and ELISA method(determination coefficients R2＞0.97).Specifically,the detection results obtained using the ELISA method are essentially consistent with those obtained by microplate reader(R2=0.987 3).In conclusion,the system has the advantages of portability and speed,which does not require laboratory equipment,and is suitable for non-professionals to perform rapid quantitative detection of ractopamine on-site.