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Method for detecting freshness of unhusked rice

A detection method and technology of freshness, which is applied in the field of food science and can solve problems such as the inability to accurately detect the freshness of grains

Active Publication Date: 2019-07-09
ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of mixed new and old rice, grain purchase enterprises cannot accurately detect the freshness of the grain by using the existing detection methods. Therefore, it is necessary to provide a new detection method for the freshness of rice.

Method used

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  • Method for detecting freshness of unhusked rice
  • Method for detecting freshness of unhusked rice
  • Method for detecting freshness of unhusked rice

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Embodiment Construction

[0042] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0043] Such as figure 1 As shown, one embodiment of the present invention provides a kind of paddy freshness detection method, comprising:

[0044] Sequentially dyeing, washing and eluting the processed polished rice or brown rice samples to obtain the eluate;

[0045] Measure the absorbance value OD of eluate at 610nm and 690nm wavelength respectively 610 and OD 690 , and △OD=OD 610 -OD 690 as the grain breakage index of polished rice samples or brown rice samples;

[0046] According to the grain breakage index of the...

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Abstract

The invention discloses a method for detecting freshness of unhusked rice. According to the specific implementation mode, the method for detecting the freshness of the unhusked rice comprises the steps that dyeing, washing and eluting are carried out in sequence on polished rice samples or brown rice samples processed by the paddy to obtain an eluent; light absorption values OD610 and OD690 of theeluent at wavelength positions of 610 nm and 690 nm are separately measured, and deltaOD=OD610-OD690 is used as a grain crushed index of the polished rice samples or the brown rice samples; and the aging rice content of the polished rice samples or the brown rice samples is obtained according to the grain crushed index of the polished rice samples or the brown rice samples. The implementation mode can accurately detect the freshness of the unhusked rice and rice.

Description

technical field [0001] The invention relates to the technical field of food science. More specifically, it relates to a method for detecting the freshness of rice. Background technique [0002] After long-term storage of rice, after husking or direct grinding into polished rice, the sensory attributes of cooked rice will change, including changes in aroma and texture. Compared with new rice, the texture of steamed rice after processing old rice into polished rice will become harder, and the ratio of adhesion / hardness will decrease. Most Chinese people prefer rice processed from fresh rice. [0003] Many physiological and physicochemical changes will occur during rice storage, and these changes will affect the quality of rice grains. [0004] On the one hand, the degree of freshness of rice can be determined by evaluating the texture of cooked rice after processing into polished rice, or other physicochemical properties, such as thermal properties and gelatinization charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00G01N21/31
CPCG01N5/00G01N21/314
Inventor 李兴军林乾韩志强陈治天王若兰王丽娜
Owner ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION
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