Rapid Detection Of Aflatoxin Based On Smartphone

Aflatoxin is a secondary metabolite mainly produced by Aspergillus parasiticus.Aflatoxin can destroy liver tissue of humans and animals,and even worse,it can cause liver cancer and even death.In the traditional aflatoxin detection method,it is necessary to use professional equipment or a cumbersome operation of a professional,and the rapid detection requirement for aflatoxin cannot be satisfied.Therefore,it is necessary to develop a real-time,portable and simple aflatoxin detection system.Thanks to its portability,high popularity,excellent image acquisition performance,powerful computing power and open application software development environment,smartphones have gradually emerged in biometric systems.This paper developed a rapid and portable detection system for aflatoxin based on smart phone and 3D printing technology,and carried out experimental research on the degradation of aflatoxin by ultraviolet and microwave irradiation.The main research contents are as follows:(1)Since our detection system is based on the fluorescent properties of aflatoxin,a darkroom is required to eliminate the effect of external light on the experimental results.In this paper,a portable device that is compatible with a mobile phone is designed,printed,and assembled using the 3D printing technology that is now popular and gradually popularized to serve as a darkroom function required in the system.(2)Due to the popularity of the Android operating system and the high openness of the platform,this paper developed software for implementing the aflatoxin detection system.The software is based on the Android operating system,written in Java and runs on Android smartphones.The sample is sampled by calling the smartphone camera,and then the image is processed.According to the analysis of the fluorescence brightness of the image,the rapid detection of aflatoxin is achieved.(3)Studies have shown that irradiation can degrade the content of aflatoxin in food,and the amount of irradiation dose has a great influence on the degradation rate of aflatoxin.In the paper,ultraviolet light and 2.45 GHz microwave were used for irradiation.The effects of irradiation intensity and time on the degradation of aflatoxin were discussed.(4)In order to improve the irradiation dose and analyze the influence of microwave frequency on aflatoxin,this paper designs the UWB antenna,which has the advantages of good directionality and frequency bandwidth,and can be used to find the most degraded aflatoxin.Good frequency of action.