Method for detecting micro-mechanical injuries on agricultural product surface

Abstract

The invention discloses a method for detecting mechanical injuries for fresh products, aiming at providing a method for detecting micro-mechanical injuries on an agricultural product surface. The method comprises the following steps of: adding gelatin to water so as to prepare gelatin coatings, and dropping bromcresol purple indicator or bromothymol blue indicator to the gelatin coatings; covering the gelatin coatings on the agricultural product surface to form a coating film for 24 hours, and then taking off the coating film; and using a microscope to observe color-changing condition of the coating film to find out the injuries where distinctive color change appears. The method, which uses transparent coatings containing acid-base indicator to perform film coating on leaf vegetables so as to detect the micro-injuries through post-film microscopic observation and photograph, belongs to pioneering researches, thus having important practical significance. By using the method for detecting the mechanical injuries for the fresh products, the degree of the fresh products and the approximate injury time can be fast detected, so that the products can be evaluated, and storage and sales of the fresh products are guided; meanwhile, the recovery of the fresh products can be guided, thereby reducing the mechanical injuries so as to reach the final purpose of reducing proportion of goods damaged.

Description

technical field [0001] The invention belongs to a method for detecting mechanical damage of fruits and vegetables in the field of food storage and preservation, in particular to a method for detecting micro mechanical damage on the surface of agricultural products. Background technique [0002] Mechanical damage is the main factor of postharvest economic loss of fruits and vegetables. During the whole process of fruits and vegetables from harvesting, packaging, storage, transportation to consumers, they will inevitably suffer from different degrees of mechanical damage, such as extrusion, vibration, collision, impact, etc., which will seriously damage the fruit and vegetable tissue and cause rot. Lead to loss of commodity value, or lead to decline in quality and shortened storage period. Fruits and vegetables are mechanically injured, and pathogenic microorganisms can easily invade through the wound after harvest, causing a large amount of decay. For fruits and vegetables ...

AI Technical Summary

Problems solved by technology

However, these methods can only detect large-area or large-volume mechanical damage

For mechanical injuries that are difficult to detect with the human eye, even in appearance, there is currently no good detection method

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