Aquatic product formaldehyde rapid detection device and method based on visual olfactory fingerprint technology

Abstract

The invention provides an aquatic product formaldehyde rapid detection device based on a visual olfaction fingerprint technology. The device comprises an upper computer, an image acquisition chamber, a camera bracket, a camera, a planar diffuse reflection light source, a reaction chamber, a color-sensitive sensor, a gas collection chamber, a pump, a nitrogen cylinder, an organic absorption tank, an inorganic absorption tank, a gas inlet pipeline and a gas outlet pipeline, wherein the planar diffuse reflection light source is mounted at the bottom of the inner side of the image acquisition chamber, the reaction chamber is mounted on the upper surface of the planar diffuse reflection light source, and the color-sensitive sensor is mounted on the upper surface of the reaction chamber; the camera is mounted right above the reaction chamber through a camera bracket and is connected with an external upper computer through a data line; the gas collecting chamber and the nitrogen cylinder are simultaneously connected with a pump through pipelines, the pump is connected with one end of a reaction chamber through a gas inlet pipeline, and the other end of the reaction chamber is sequentially connected with an organic absorption tank and an inorganic absorption tank through gas outlet pipelines. The device and method is simple to operate, high in detection speed, low in cost and environment-friendly, and can be used for quickly detecting the content of formaldehyde in various links of aquatic products.

Description

technical field [0001] The invention relates to a method and device for rapid detection of formaldehyde in aquatic products, in particular to a device and method for rapid detection of formaldehyde in aquatic products based on visual olfactory fingerprint technology, belonging to the technical field of agricultural product detection. Background technique [0002] Aquatic products are not only delicious, but also rich in high-quality protein, unsaturated fatty acids, vitamins and minerals and other nutrients, and are deeply loved by consumers. However, due to the high moisture content of aquatic products, fragile muscle tissue, and active endogenous proteases, proteins are prone to degradation during storage, resulting in spoilage of aquatic products. Therefore, some unscrupulous traders use formaldehyde on squid, etc. in order to prolong the shelf life of products. Aquatic products are treated with antiseptic treatment. After formaldehyde treatment, the protein of the squid ...

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Problems solved by technology

[0003] The traditional detection methods of formaldehyde in aquatic products mainly include spectrophotometry, electrochemical method and chromatography. Although these methods have high sensitivity and accurate measurement results, they all have long detection time, high detection cost and complicated pretreatment to varying degrees. and other defects

For example, the determination method of formaldehyde content in aquatic products stipulated in the current standard SC / T 3025-2006 requires distillation to extract formaldehyde in aquatic products. The steps are cumbersome and time-consuming, and it is difficult to quickly detect on-site; the patent application number is The invention patent of 201510789129.X discloses a detection method of formaldehyde content in mackerel. Although the detection cost of this method is low and it can effectively extract and detect formaldehyde in mackerel, it still needs pretreatment, extraction, essence, oxidation reaction, Titration and other operation steps, pretreatment is complicated, and the detection period is long; the invention patent with the patent application number 201310371538.9 discloses a method for the rapid detection of volatile formaldehyde by surface-enhanced Raman spectroscopy, although this method is more convenient and quicker than the traditional method, However, in the detection process of this method, the sample needs to be pulverized, and then the spectrum is measured by Raman enhanced technology after derivatization reaction. The operation is very complicated, and the equipment cost is also high, which is not conducive to popularization and use.

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