Set for indicating shelf life of hypothermal circulating goods in enzyme reaction type

A technology of shelf life and indicating device, applied in signal device, material analysis by observing the effect on chemical indicator, visible signal device, etc., can solve problems such as inability to judge quality and safety

Inactive Publication Date: 2005-10-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, based on the temperature during storage and retailing, as a consumer, it is impossible to know whether these items have und

Method used

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  • Set for indicating shelf life of hypothermal circulating goods in enzyme reaction type

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Embodiment Construction

[0010] Specific embodiments of the present invention will be described in detail with reference to the above-mentioned drawings. figure 1 Provided is an enzyme-reaction type shelf life indicator device for low-temperature circulating goods, which includes a transparent container made of transparent plastic, and a plastic diaphragm 4 is arranged inside the transparent container, so that the transparent container is divided into chamber one 1 and chamber two 3 that are not connected to each other , the chamber one 1 and chamber two 3 here are in the relationship of the upper and lower chambers, that is, the upper chamber 1 and the lower chamber 3 are formed. The upper chamber 1 contains natural urease 2, and the lower chamber 3 contains urea as a substrate and phenolphthalein as a pH indicator.

[0011] In actual use, the enzyme reaction type low-temperature circulation item shelf life indicating device is fixed together with the items that need low-temperature circulation. The...

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Abstract

The invention discloses the enzyme-reaction low-temperature current goods shelves life indicating device, which comprises the transparent container that has the plastic diaphragm in order to divide the container into non-communicated chamber one and two. The chamber one is filled with urea enzyme and the chamber two with the base material and the pH indicator.

Description

technical field [0001] The invention relates to an indicating device, in particular to an enzyme-reaction type low-temperature circulating article shelf life indicating device. Background technique [0002] With the enrichment of material life and the improvement of aquatic products in people's lives, many raw materials for food, medicine and electronic products need to be circulated at low temperatures in order to ensure their quality; Freeze at temp. It is known that the quality, safety, and shelf life of these cold circulation items are most dependent on temperature, not time. However, only by the temperature during storage and retailing, as a consumer, it is impossible to know whether these items have undergone thawing or high temperature treatment during circulation; therefore, it is still impossible to judge whether their quality is good or bad and whether they are safe. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present inv...

Claims

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Application Information

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IPC IPC(8): G01N21/80
Inventor 叶兴乾吴秋明刘东红陈健初吴丹
Owner ZHEJIANG UNIV
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