Near-infrared inspection method for rice quality and application thereof

A near-infrared detection and near-infrared technology, which is applied in the field of near-infrared detection of rice quality, can solve the problems of many spectra, unclear spectral characteristic wavelengths, and few reports of prediction models, and achieves fast prediction speed, improved accuracy, and rapid detection. Effect

Active Publication Date: 2015-12-23
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these studies still have a lot of redundant information in the spectrum, the characteristic wavelength of the spectrum is not clear, and there are few reports on the prediction model. question

Method used

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  • Near-infrared inspection method for rice quality and application thereof
  • Near-infrared inspection method for rice quality and application thereof
  • Near-infrared inspection method for rice quality and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Embodiment 1: the establishment of the near-infrared model of rice protein

[0096] (1) Extensive collection of typical rice samples: The rice samples were provided by the Huanggang Agricultural College in Hubei Province, and the 46 sample varieties are shown in Table 1. Part of the samples were mixed evenly according to the ratio of 1:1 and 1:2 to obtain 44 new samples, 90 samples in total, that is, n=90. Adopt national standard method 【8】 Determination of the protein content, the basic statistics of the protein content of rice samples are shown in Table 2.

[0097] Table 2 Basic statistical data of rice protein content. (%)

[0098]

[0099] (2) Use the SupNIR-2720 near-infrared spectrometer to collect the spectrum. The measurement range of the spectrum is 1000-1799nm, and the spectral step is 1nm. In order to reduce the error, each sample is scanned 3 times. Before scanning, the instrument is preheated for 30 minutes, and the scanning The data is stored in the fo...

Embodiment 2

[0112] Example 2: Establishment of a near-infrared model of rice total sugar, fat, ash, brown rice moisture and polished rice protein

[0113] (1) Use a huller to remove the husks to obtain 46 varieties of brown rice, and remove the bran powder from the brown rice with a rice mill to obtain 46 varieties of polished rice. Some brown rice samples were mixed in pairs at a ratio of 1:1 to obtain 20 mixed samples, a total of 66 brown rice samples, and some polished rice samples were mixed in pairs at a ratio of 1:1 to obtain 20 mixed samples, a total of 66 polished rice samples.

[0114] (2) Determination of total sugar in rice with the method of national standard 【11】 ,Fat 【9】 , ash 【12】 , brown rice moisture 【10】 and polished rice protein 【8】 . Wherein the basic statistical data of brown rice moisture and polished rice protein test results are shown in Table 5 and Table 6.

[0115] The basic statistical data (%) of moisture content of brown rice of table 5

[0116]

[0...

Embodiment 3

[0141] Embodiment 3: the establishment and detection of the near-infrared model of the broken rice rate, chaff rate, polished rice rate of rice, and the bran flour rate of brown rice

[0142] (1) Spectrum scanning of paddy, brown rice and polished rice, spectral denoising, pretreatment, method is the same as embodiment 1.

[0143] (2) Screening of characteristic wavelength, method is the same as embodiment 1.

[0144] (3) The broken rice rate of rice, chaff rate, polished rice rate, the establishment of the near-infrared model of the bran flour rate of brown rice, method is the same as embodiment 1.

[0145] Among them, the prediction model of rice husk rate built is as follows:

[0146] Chaff rate:

[0147] z 6 =242.98+237.70B 1127 -334.69B 1264 -229.12B 1446 +254.35B 1495

[0148] -251.58B 1597

[0149] Broken rice rate:

[0150] z 8 =4405.08+5499.36B 1183 -7169.48B 1243 -4562.46B 1579 +5392B 1584

[0151] -5103.13B 1723

[0152] Bran flour rate:

[0153]...

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Abstract

The invention belongs to the technical field of agricultural product constituent inspection and relates to the technical field of physical and chemical analysis of rice, in particular to a near-infrared inspection method for rice quality and application thereof. The method is characterized in that samples to be tested are subjected to near-infrared scanning to obtain an original wave spectrogram of light absorption values based on wavelengths; next, the original wave spectrogram is subjected to noise elimination processing and pre-processing, and characteristic wavelengths are filtered from processed spectra; lastly, the characteristic wavelengths are substituted into a prediction model of sample quality indexes to obtain near-infrared inspection values of sample quality. The rice includes unhusked rice, unpolished rice and polished rice. Inspection quality includes protein, fat, moisture, total sugar, ash content and the broken rice rate, the husking rate, the rice bran powder rate and the head rice rate of the rice. Inspection application includes rice quality prediction through the model and modification of the model. The near-infrared inspection method for rice quality and the application thereof have the outstanding advantages that the test speed is high, and the samples will not be damaged.

Description

technical field [0001] The invention belongs to the technical field of agricultural product quality analysis, and in particular relates to a near-infrared detection method and application of rice quality. Background technique [0002] Rice is the main food crop in my country, which contains protein, fat, water, total sugar, ash and other nutrients. The detection of these components has the disadvantages of complicated operation, time-consuming and laborious. Near-infrared light is an electromagnetic wave with a wavelength between the visible light region and the mid-infrared region. The American Society for Testing and Materials (ASTM) defines the near-infrared spectral region as the region of 780-2526nm. Near-infrared spectroscopy is mainly generated when the molecular vibration transitions from the ground state to a high energy level due to the anharmonicity of molecular vibration, and records the combined frequency and double frequency absorption of the vibration of hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359G01N21/3563
Inventor 黄汉英赵思明胡月来熊善柏
Owner HUAZHONG AGRI UNIV
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