Near infrared spectroscopy analysis rapid detection method of rice freshness

A technology of near-infrared spectroscopy and a detection method, which is applied in the field of rapid detection of rice freshness by near-infrared spectroscopy, can solve problems such as low efficiency and long time consumption, and achieve the effects of low analysis cost, fast analysis speed and high analysis efficiency.

Inactive Publication Date: 2011-01-05
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Near infrared spectroscopy analysis rapid detection method of rice freshness
  • Near infrared spectroscopy analysis rapid detection method of rice freshness
  • Near infrared spectroscopy analysis rapid detection method of rice freshness

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings.

[0015] (1) Take 30 rice samples stored in different periods from half a year to three and a half years (in "months"), 180 samples (in line with the normal distribution of rice populations); turn on the near-infrared spectrometer at 25°C Heat for 30 minutes, take 15g of rice samples and put them in the sample box, try to remove the air to reduce the influence; use the transmission-reflection integrating sphere mode to collect spectra, the transmission-reflection optical path is 0.1 mm, the scanning spectrum area is 850nm~1050nm, the number of scanning is 32 times, and the resolution Rate 8cm -1 , to collect the absorption spectrum of the sample; in order to overcome the spectral drift caused by the difference in sample particle size and reduce the error, each sample was loaded three times, and the average value of the obtained near-infrared abs...

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Abstract

The invention discloses a near infrared spectroscopy analysis rapid detection method of rice freshness, comprising the following steps of: firstly, establishing a near infrared spectroscopy of a calibration set sample; secondly, preprocessing near infrared spectroscopy data of the calibration set sample; thirdly, extracting characteristic information of the near infrared spectroscopy of the calibration set sample; fourthly, establishing a calibration model; fifthly, verifying the calibration model; and sixthly, analyzing a sample to be tested, preprocessing the near infrared spectroscopy of the sample, extracting the characteristic information, and inputting into the calibration model to calculate the freshness of the rice sample. The invention has the advantages of rapid analysis speed, high analysis efficiency, low analysis cost, no pollution on environment without using any chemical reagent, and the like and can supply the reliable basis of rice classification, storage in separate rooms and quality control of rice and processed products.

Description

technical field [0001] The invention relates to a method for detecting the freshness of rice, in particular to a method for rapidly detecting the freshness of rice by near-infrared spectroscopy. Background technique [0002] Rice is an indispensable staple food in people's life. After long-term storage of rice, due to the influence of temperature, moisture and other factors, the rice will lose its original color, aroma and taste, its nutritional content and edible quality will decline, and even produce toxic and harmful substances (such as aflatoxin, etc.), namely aged. The degree of freshness is one of the main indicators to distinguish the quality of rice, and it has always attracted people's attention. [0003] At present, the methods used to identify the freshness of rice in my country are mainly based on sensory identification and the guaiacol reaction method recorded in the appendix of the national standard GB / T5009 36-1996. The guaiacol reaction method is based on ...

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Application Information

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IPC IPC(8): G01N21/35G01N21/3563G01N21/359
Inventor 李忠海徐彦付湘晋胡叶碧钟海雁张慧
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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