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Method of optimizing peanut freshness detection conditions of electronic nose of gas sensor

A sensor and electronic nose technology, applied in the direction of material resistance, etc., can solve the problems of long time-consuming acid value and peroxide value measurement, difficult to clean the instrument, and affect the detection results, etc., to achieve high promotion and application value, good discrimination effect

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

AI Technical Summary

Problems solved by technology

However, when using the above methods for freshness detection, there are some problems: the results of sensory evaluation are greatly affected by personal and environmental factors, and it is difficult to form a unified standard; while the determination of acid value and peroxide value takes a long time and requires high operation. And the instrument is not easy to clean
As a convenient and objective quality detection method, the electronic nose has broad application prospects in the food field, but changes in detection conditions will affect the detection results

Method used

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  • Method of optimizing peanut freshness detection conditions of electronic nose of gas sensor
  • Method of optimizing peanut freshness detection conditions of electronic nose of gas sensor
  • Method of optimizing peanut freshness detection conditions of electronic nose of gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Taking the FOX4000 electronic nose of French Alpha MOS company as the detection instrument in detail, the electronic nose system consists of 18 metal oxide sensors, and its model and response characteristics are shown in Table 1:

[0019] Table 1 Response characteristics of each sensor of FOX4000 electronic nose

[0020]

[0021] Wash the surface of the newly produced Xiaobaisha peanuts with clean water, dry the water and put them in a cool place. After the surface water evaporates completely, select the peanuts with intact shells and put them in beakers of different volumes according to different masses. According to the quality of peanuts and the volume of the beaker, the above samples can be divided into 9 groups: 10g-150ml (mass volume ratio 1:15), 10g-200ml (1:20), 10g-250ml (1:25), 20g-150ml (1:25) 7.5), 20g-200ml (1:10), 20g-250ml (1:12.5), 30g-150ml (1:5), 30g-200ml (1:6.67), 30g-250ml (1:8.33). After the nine groups of samples were sealed for 5 minutes, 15 ...

Embodiment 2

[0027] The PEN2 electronic nose of Germany AIRSENSE company is a detailed description of the detection instrument. The electronic nose system is composed of 10 metal oxide sensors. Its model and response characteristics are shown in Table 2:

[0028] Table 2 Response characteristics of each sensor of PEN2 electronic nose

[0029]

[0030] Wash the surface of the newly produced Xiaobaisha peanuts with clean water, dry the water and place them in a cool place. After the water evaporates completely, select the peanuts with intact shells and put them in beakers of different volumes according to different masses. Peanut quality and beaker volume can divide the above peanut samples into 9 groups: 10g-150ml (mass volume ratio 1:15), 10g-200ml (1:20), 10g-250ml (1:25), 20g-150ml (1:25) 7.5), 20g-200ml (1:10), 20g-250ml (1:12.5), 30g-150ml (1:5), 30g-200ml (1:6.67), 30g-250ml (1:8.33). Nine groups of samples were tested by electronic nose after sealing for 5 minutes, 15 minutes and...

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Abstract

The invention discloses a method of optimizing peanut freshness detection conditions of an electronic nose of a gas sensor. The method comprises: cleaning and wiping the surfaces of newly produced peanuts, picking up 10-30g of peanut samples with intact shells, putting the peanut samples in a 150-250ml beaker, dividing the peanut samples into 9 groups and sealing the peanut samples, detecting the headspace gases through the electronic nose, selecting the maximal value of the response values of the sensors as the mass-volume original data before storage; storing the detected 9 groups of peanut samples, taking out the peanut samples 2 days later, sealing the peanut samples, detecting the headspace gases through the electronic nose for the second time, and selecting the maximal value or stable value of the response values of the sensors as the mass-volume original data after storage; and introducing the mass-volume original data before storage and the mass-volume original data after storage in a mode identification software SPSS to analyze the main ingredients so as to obtain the optimized detection conditions. The method disclosed by the invention optimizes the conditions of detecting the peanut freshness of the gas sensor in a convenient, objective and intact manner and has good partition degree, so that the method has high generalization and application values.

Description

technical field [0001] The invention relates to a method for optimizing the condition of peanut freshness detected by an electronic nose of a gas sensor. Background technique [0002] Peanuts with different degrees of freshness are almost impossible to distinguish with the naked eye when they are in the shell. At present, scholars at home and abroad generally use sensory evaluation or comprehensive determination of acid value and peroxide value when testing the freshness of peanuts. However, when using the above methods for freshness detection, there are some problems: the results of sensory evaluation are greatly affected by personal and environmental factors, and it is difficult to form a unified standard; while the determination of acid value and peroxide value takes a long time and requires high operation. And the instrument is not easy to clean. As a convenient and objective quality detection method, electronic nose has broad application prospects in the field of food...

Claims

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Application Information

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IPC IPC(8): G01N27/12
Inventor 王俊叶蔺霜
Owner ZHEJIANG UNIV