Portable rapid food and drug quality detection device and method

Abstract

The invention discloses a portable rapid food and drug quality detection device and method. The device comprises a sample pool, a laser radiating unit, an ultrasonic detector, a signal processing unit, a control display unit and the like. By virtue of an opto-acoustic non-destructive testing technology, the detection method, compared with a liquid / gas phase chromatographic method, can be used for directly detecting a tested sample without performing complex preprocessing operation on the sample, and irreversible destructiveness on the nature of the tested sample can be avoided; and compared with non-destructive detection methods such as near infrared spectroscopy, the detection method can relatively well avoid adverse impact of scattered light from components inside the sample on the transmission or reflection spectrum measurement of the tested sample, so that the detection accuracy is greatly improved. As an embedded system and a control display unit touch screen adopted by a large pulsed laser and a data processing unit are replaced by virtue of a laser diode rotating device, the detection device disclosed by the invention is relatively high in integration degree, and is relatively low in cost when multiple excitation wavelengths of a light source is guaranteed.

Description

technical field [0001] The invention relates to the technical field of food and drug quality safety detection, in particular to a portable food and drug quality rapid detection device and detection method. Background technique [0002] In recent years, counterfeit, shoddy or even poisonous food and medicines have emerged one after another, such as waste oil, poisoned rice, poisonous capsules and counterfeit medicines. People are increasingly worried that there are serious quality and safety problems in the daily necessities of food and medicines. Although the government and food and drug quality supervision departments have stepped up efforts to crack down on counterfeit and shoddy food and drugs, similar incidents still occur from time to time, causing great psychological panic and integrity crises to the people and society. At present, the places where formal food and drug testing can be carried out in my country are still the quality inspection and quarantine inspection d...

AI Technical Summary

Problems solved by technology

At present, most of the inspection and quarantine departments' testing equipment for food and drug quality are bulky and single-function equipment, and the techniques used are traditional physical and chemical inspection methods, gas phase or liquid chromatography and other methods.

For physical and chemical testing methods, by adding chemical testing reagents that can react with the unique chemical components in adulterated items to food or medicines, it is possible to check whether food and medicines are mixed with additives, etc.; and gas phase or liquid chromatography detection equipment When in use, it is necessary to liquefy or gasify the tested food under high temperature and high pressure, and then perform repeated separation and extraction and other sample pretreatment steps. Due to the complex structure and operation steps of the equipment, this kind of detection requires professionals, and the detection The speed and effect are not satisfactory, and it is not suitable for the quality inspection of food and drugs in townships and rural areas or grassroots departments

Moreover, liquid and gas chromatography detection is a destructive detection method, and the tested samples cannot be reused, resulting in a certain degree of waste

In recent years, non-contact non-destructive testing methods have also been gradually applied to food and drug quality testing. The representative non-contact non-destructive testing methods include spectroscopy, which uses near-infrared or mid-infrared spectroscopy and chemometric methods. To classify and classify the quality of food and drugs, as well as to detect adulteration and additive content, although non-contact non-destructive testing can be achieved, but because food and drugs have a certain scattering of incident light, for solid and powder samples, Its scattered light is more prominent, which will inevitably affect the spectral information related to the additive. Although in the subsequent data processing process, software programming can be used to eliminate the influence of noise and other factors, but the quality of the effect directly affects the mathematical model, and finally affects the Accuracy of food testing

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