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Nondestructive rapid detection method of quality index of shell agricultural products

A technology for agricultural products and shells, which is applied in the field of non-destructive and rapid detection of quality indicators of shell agricultural products, can solve the problems of difficulty in forming a unified standard, high operation requirements, and long time-consuming determination of acid value and peroxide value, etc., to achieve non-destructive testing, Simple operation effect

Active Publication Date: 2012-10-24
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when using the above methods for quality inspection, there will be some problems: the results of sensory evaluation are greatly affected by personal and environmental factors, and it is difficult to form a unified standard; The instrument is not easy to clean
However, these detection methods require a large amount of samples and a long detection time, and when detecting shell agricultural products, they must be shelled for detection, which brings great inconvenience to the actual operation.

Method used

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  • Nondestructive rapid detection method of quality index of shell agricultural products
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  • Nondestructive rapid detection method of quality index of shell agricultural products

Examples

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Embodiment 1

[0046] The invention is suitable for quality detection of various shell agricultural products such as peanuts, walnuts, almonds, pistachios and melon seeds. In this embodiment, peanuts are used as the detection sample, and the FOX4000 electronic nose of France Alpha MOS Company is used as the detection instrument to describe in detail. The electronic nose system is composed of 18 metal oxide sensors, whose models and response characteristics are shown in Table 1:

[0047] Table 1 Response characteristics of each sensor of FOX4000 electronic nose

[0048]

[0049]The newly produced Xiaobaisha peanuts were selected and the shells were intact and undamaged. The peanut samples to be tested for modeling were divided into 8 groups, and placed in an artificial climate box with a temperature of 27 ° C and a humidity of 85% to 90%. , 8, 10, 12 and 14 days, test 8 samples per day, each sample 26g (9 peanuts). When testing, first wash the surface of the sample to be tested with dist...

Embodiment 2

[0066] In the example of the present invention, peanuts are used as the detection sample, and the PEN2 electronic nose of the German Airsense company is used as the detection instrument to describe in detail. The electronic nose system consists of 10 metal oxide sensors, and their models and response characteristics are shown in Table 1:

[0067] Table 1 Response characteristics of each sensor of PEN2 electronic nose

[0068]

[0069] The newly produced Xiaobaisha peanuts were selected and the shells were intact and undamaged. The peanut samples to be tested for modeling were divided into 8 groups, and placed in an artificial climate box with a temperature of 27 ° C and a humidity of 85% to 90%. , 8, 10, 12 and 14 days, test 8 samples per day, each sample 26g (9 peanuts). When testing, first wash the surface of the sample to be tested with distilled water, dry the water and place it in a cool place. After the water evaporates completely, follow the steps below for electron...

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Abstract

The invention discloses a nondestructive rapid detection method of quality index of shell agricultural products. The method comprises the steps of removing impurities from surfaces of to-be-detected shell agricultural products, cleaning, selecting products with intact shells, dividing into to-be-detected products for modeling and unknown to-be-detected products; placing in closed container, detecting headspace gas by electronic nose to obtain sensor response values; immediately shelling the products for modeling to collect kernels, extracting oil / fat, and determining acid value and peroxide value; establishing regression model between electronic nose response signal and acid value / peroxide value of the products for modeling, selecting the model with high correlation coefficient R as prediction model for shell agricultural product quality; and substituting sensor response values of the unknown products into the prediction model to estimate internal quality. The detection method directly detects quality of shell agricultural products with electronic nose without shelling, and is simple in operation and high in accuracy.

Description

technical field [0001] The invention relates to a non-destructive and rapid detection method for quality indicators of shell agricultural products. Background technique [0002] Shell agricultural products (such as peanuts, melon seeds, pine nuts, pistachios, walnuts, etc.) are mostly rich in oil and protein, and their quality is prone to change in the case of high moisture and strong metabolism. Scholars at home and abroad generally use sensory evaluation or comprehensive determination of acid value and peroxide value when testing the quality of shell agricultural products. The latter has been included in the national standard as an important indicator for testing the quality of shell agricultural products. However, when using the above methods for quality inspection, there will be some problems: the results of sensory evaluation are greatly affected by personal and environmental factors, and it is difficult to form a unified standard; The instrument is not easy to clean. ...

Claims

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Application Information

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IPC IPC(8): G01N27/26
Inventor 王俊叶蔺霜
Owner ZHEJIANG UNIV
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