Device and method for rapid detection of food and drug component content by photoacoustic coupled spectroscopy

Abstract

The invention discloses a device and method for rapid detection of food and drug component content by photoacoustic combined spectroscopy, including a light source radiation unit, a detection room unit, a spectrum splitting unit, a photoacoustic detection unit, a signal processing unit, a signal control unit and Signal display unit. The present invention has the following beneficial effects: on the one hand, it is convenient and fast to use the spectral method to find the characteristic wavelength, which greatly saves and facilitates the selection of the characteristic wavelength in the photoacoustic detection method, so that the detection efficiency is greatly improved; on the other hand, the use of photoacoustic technology The qualitative and quantitative detection of the measured substance avoids the interference caused by the multi-component scattered light in the measured substance in the spectroscopic method, so that the detection accuracy is greatly improved.

Description

technical field [0001] The invention relates to the field of food and drug quality detection, in particular to a rapid detection device for food and drug components and content by photoacoustic coupled spectroscopy. Background technique [0002] With the improvement of people's living standards and the emphasis on health, the quality of food and medicine has increasingly become a hot spot of social concern. Recently, food and drug quality issues have been repeatedly exposed, such as the "cadmium rice" incident, the "poisonous milk powder" incident, the "melamine" incident, the "poisonous capsule" incident, etc. Similar incidents have seriously affected social stability and caused people to There is a crisis of confidence in the relevant manufacturers and supervisory departments. [0003] Food and drug safety is a major issue related to the national economy and the people's livelihood. At present, the inspection methods often used by the quarantine department mainly rely on ...

AI Technical Summary

Problems solved by technology

However, when photoacoustic technology is used for detection, its composition and content cannot be judged by real-time photoacoustic time domain signals, but it needs to be analyzed by obtaining photoacoustic values ​​at certain characteristic wavelengths

However, since the characteristic wavelength of the measured component is not known in advance, it is necessary to collect the photoacoustic signal of each wavelength, and then find out the characteristic wavelength, which makes the detection process take a long time, and whether the characteristic wavelength is selected correctly or not It directly affects the reliability and accuracy of the detection of the measured components

Images