Surface-mounted gas sensor device for detecting formaldehyde in food packaging container as well as preparation method and application of surface-mounted gas sensor device

Abstract

The invention discloses a surface-mounted gas sensor device for detecting formaldehyde in a food packaging container. The surface-mounted gas sensor device comprises an air chamber, a formaldehyde sensor element, a signal processing module and a connecting line, wherein the air chamber comprises a first connecting piece, a second connecting piece, a connecting wall positioned between the first connecting piece and the second connecting piece as well as an inner cavity formed by surrounding the first connecting piece, the second connecting piece and the connecting wall; the formaldehyde sensorelement is positioned in the inner cavity; the top surface of the formaldehyde sensor element is combined and fixed with the bottom surface of the first connecting piece; the signal processing moduleis positioned on the first connecting piece; the bottom surface of the signal processing module is combined and fixed with the top surface of the first connecting piece; the connecting line penetratesthrough the top surface and the bottom surface of the first connecting piece; one end of the connecting line is connected with the signal processing module; the other end of the connecting line is connected with the formaldehyde sensor element; the top end of the connecting wall comprises a groove which is formed by inward concaving the side face of the top end of the connecting wall and is matched with the top end of the formaldehyde sensor element. According to the device, the formaldehyde in food package can be detected in real time.

Description

technical field [0001] The invention relates to the field of agricultural information technology. More specifically, it relates to a patch detection device for detecting formaldehyde in food containers and its preparation method and application. Background technique [0002] Formaldehyde is a colorless gas with a strong pungent smell, which has the functions of antiseptic, fresh-keeping and sterilization. The sources of formaldehyde in food include both endogenous and exogenous sources. Among them, endogenous formaldehyde is a necessary prerequisite for the synthesis of certain amino acids in animals and plants, and is a metabolite of animals and plants themselves; exogenous formaldehyde includes Artificial addition of formaldehyde, formaldehyde pollution of raw and auxiliary materials, and pollution caused by the migration of formaldehyde contained in containers, pipelines and packaging materials in food processing, etc. According to reports, in food packaging materials, ...

AI Technical Summary

Problems solved by technology

Various detection methods have their own advantages and disadvantages. For example, spectrophotometer equipment is simple and quick to operate, but the food matrix is ​​complex and easily interfered, and its accuracy and sensitivity are poor; chromatography method has high sensitivity and accuracy, but its pretreatment method is complicated , a distillation device that requires a response, the operation is cumbersome, and it is not suitable for on-site real-time monitoring; while the current sensor methods for formaldehyde detection include electrochemical sensors, optical sensors and photobiochemical sensors, etc. The sensors have good selectivity and stability. But the price is high and difficult to popularize

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