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Method for rapidly detecting content of polysaccharides in rice bran based on ATR-FTIR technology

A polysaccharide content and detection method technology, applied in the direction of measuring devices, test sample preparation, sampling, etc., can solve the problems of rapid evaluation, cumbersome process, complicated pre-treatment, etc., and achieve the effect of improving timeliness

Pending Publication Date: 2021-05-07
NANJING UNIV OF FINANCE & ECONOMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, the measurement of polysaccharide content in rice bran is mostly obtained by chemical measurement after pretreatment. The pretreatment is complicated, the operation steps are cumbersome, and the timeliness is low, which cannot meet the rapid evaluation of quality changes during processing.
The relevant polysaccharide determination methods include GB / T 5513-2019 Grain and Oil Inspection, Determination of Reducing Sugar and Non-reducing Sugar in Grain, and a simple and effective detection method of mulberry leaf polysaccharide in Chinese patent (CN105806793B). Measurement after extraction, the process is more cumbersome

Method used

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  • Method for rapidly detecting content of polysaccharides in rice bran based on ATR-FTIR technology
  • Method for rapidly detecting content of polysaccharides in rice bran based on ATR-FTIR technology
  • Method for rapidly detecting content of polysaccharides in rice bran based on ATR-FTIR technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Raw material selection

[0040] Healthy paddy with a harvest time of less than 7 days, a moisture content of less than 17% (wet basis), and no mildew and insect bites was selected as the experimental object.

[0041] 2. Use separately

[0042] (1) After the paddy is husked, the rice is milled to make rice bran and passed through a 60-mesh sieve for later use.

[0043] (2) Immediately adopt gas chromatography to analyze the polysaccharide content in the rice bran;

[0044] (3) After preheating the Fourier transform infrared spectrometer for 30 minutes, take about 1 g of rice bran sample, grind it with potassium bromide and press it into tablets, repeat three times, and take the average spectrum for later chemometric model construction, Multivariate scatter correction for each spectrum;

[0045] (4) Analyze the practicability of the model based on the relative analysis error (RPD) of the modeling. The larger the RPD, the higher the robustness. When the RPD ≥ 2.0, the ...

Embodiment 2

[0047] This embodiment is basically the same as above-mentioned embodiment 1, and difference is:

[0048] In step (1), the processing condition is set to pass through a 100-mesh sieve.

Embodiment 3

[0050] This embodiment is basically the same as above-mentioned embodiment 1, and difference is:

[0051] In step (4), the preheating time is set to 35min.

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Abstract

The invention discloses a method for rapidly detecting the content of polysaccharides in rice bran based on an ATR-FTIR technology, which comprises the following steps: (1) quantitatively weighing fresh rice bran subjected to impurity removal treatment, and measuring the optical properties of the fresh rice bran by combining an attenuated total reflection Fourier transform infrared spectrometer; (2) immediately analyzing the polysaccharide content in the rice bran by adopting a gas chromatography technology; (3) based on a partial least squares regression method, establishing a quantitative prediction model according to the polysaccharide content in the sample and the spectral information thereof, and selecting optimal modeling parameters to ensure the robustness and stability of a regression prediction model; and (4) carrying out an independent experiment, and carrying out nondestructive detection on the rice bran polysaccharide content of the blind sample in combination with the constructed ATR-FTIR model. The method can realize nondestructive quantitative detection of xylose, arabinose and other polysaccharide components in the rice bran based on the near infrared spectrum technology, the detection precision Rp2 is greater than 0.90, the detection precision RPD is greater than 2.0, and the timeliness of polysaccharide content detection in the rice bran is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of agricultural product processing and storage, and in particular relates to a rapid detection method for polysaccharide content in rice bran based on ATR-FTIR technology. Background technique [0002] Rice bran is the main by-product in the rice processing process, mainly composed of pericarp, seed coat, outer endosperm, aleurone layer and embryo. my country's annual output of rice bran is nearly 10 million tons, which is a large, cheap and nutritious by-product of grain processing. Nearly 64% of the nutrients in rice are concentrated in rice bran. Rice bran polysaccharide is one of the most valuable functional components in rice bran. It consists of xylose, galactose, mannose, rhamnose, arabinose and glucose. Sugar composition. It has various physiological functional activities such as anti-oxidation, anti-tumor, immune regulation, blood fat lowering and blood sugar lowering, and is a good raw material f...

Claims

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Application Information

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IPC IPC(8): G01N21/3563G01N1/28G01N30/02G01N30/06
CPCG01N1/286G01N21/3563G01N30/02G01N30/06G01N2021/3572G01N2021/3595
Inventor 丁超丁海臻刘强倪小颖张婷婷赵思琪
Owner NANJING UNIV OF FINANCE & ECONOMICS
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