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Preparation method of gas sensor array for detecting Jinhua hams

A gas sensor, Jinhua ham technology, applied in the field of gas sensors, can solve the problems of low sensitivity of organic gases, increase the sensor volume, low integration, etc., and achieve the effects of low cost, small impact and good repeatability

Inactive Publication Date: 2013-12-25
中安高科检测科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of gas sensor needs to be heated to about 300°C to ensure the smooth progress of the redox reaction, so it has the following disadvantages: 1. It needs a heating temperature control device, which increases the volume, power consumption and complexity of the sensor, and is inconvenient to use the current micro Electronic process production; 2. The integration level is not high; 3. The sensitivity to most organic gases with weak redox properties is not high

Method used

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  • Preparation method of gas sensor array for detecting Jinhua hams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Polytrimethylsilyl-1-propyne was purchased from Aladdin Reagent Co., Ltd., with a molecular weight of 500,000; ethanol was purchased from Aladdin Reagent Co., Ltd., which is an AR-grade pure reagent; nylon 6 was purchased from Alfa Aisha Chemical Co., Ltd. company, with a molecular weight of about 27,000; acetic acid was purchased from Bailingwei Technology Co., Ltd., with a purity of 99.8%; polyacrylamide was purchased from Bailingwei Technology Co., Ltd., with a molecular weight of 200,000; Vinyl chloride was purchased from Alfa Aisha Chemical Co., Ltd. with a molecular weight of 200,000; acetone was purchased from Alfa Aisha Chemical Co., Ltd. with a purity of 98%.

[0019] 2. Polytrimethylsilyl-1-propyne, nylon 6, polyacrylamide, and polyvinyl chloride were vapor-deposited on a circular quartz substrate with a diameter of 6 mm and a thickness of 0.8 mm on a UNIVEX-300 vacuum coating machine. The specific steps are as follows:

[0020] (1) Select a suitable subst...

Embodiment 2

[0033] 1. The reagents and polymer used are the same as those in Example 1.

[0034] 2. Polytrimethylsilyl-1-propyne, nylon 6, polyacrylamide, and polyvinyl chloride were vapor-deposited on a circular quartz substrate with a diameter of 8 mm and a thickness of 1 mm on a UNIVEX-300 vacuum coating machine. The specific steps are as follows:

[0035] (1) Select a suitable substrate holder to place the quartz substrate and polyacrylamide;

[0036] (2) Check the status of circulating cooling water, compressed air and high-purity nitrogen, and check the oil level of the mechanical pump and outlet oil mist filter;

[0037] (3) Turn the main power knob to the vertical position. After the self-test of the instrument is normal, close the bell cover, and pay attention to the position of the connecting rod on the left;

[0038] (4) Pass F 1 and F 5 Switch the display screen to the air extraction interface, start air extraction, and prohibit power failure after starting air extraction;...

Embodiment 3

[0048] 1. The reagents and polymer used are the same as those in Example 1.

[0049] 2. On the UNIVEX-300 vacuum coating machine, polytrimethylsilane-1-propyne, nylon 6, polyacrylamide, and polyvinyl chloride were vapor-deposited on a square with length × width = 8 × 8mm and a thickness of 0.8mm. On a quartz substrate, the specific steps are as follows:

[0050] (1) Select a suitable substrate holder to place the quartz substrate and polyacrylamide;

[0051] (2) Check the status of circulating cooling water, compressed air and high-purity nitrogen, and check the oil level of the mechanical pump and outlet oil mist filter;

[0052] (3) Turn the main power knob to the vertical position. After the self-test of the instrument is normal, close the bell cover, and pay attention to the position of the connecting rod on the left;

[0053] (4) Pass F 1 and F 5 Switch the display screen to the air extraction interface, start air extraction, and prohibit power failure after starting ...

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Abstract

The invention provides a preparation method of a gas sensor array for detecting Jinhua hams. The preparation method comprises the following steps: respectively evaporating films of four polymers including poly[1-(trimethylsilyl)-1-propyne], nylon 6, polyacrylamide and polyvinyl chloride on different quartz substrates, and welding the evaporated quartz substrates on a circuit board. The gas sensor array prepared by adopting the method is small in size, low in cost, good in repeatability, capable of stably working for a long time, small in influence generated by coexistence gas, and high in distinguishing property on a mixture gas; meanwhile, an electronic nose system made by combining with a piezoelectric system can be used for directly detecting the identity of the Jinhua hams without a complicated sample pretreatment process, the response is rapid, and the accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, and in particular relates to a method for preparing a gas sensor array for detecting Jinhua ham. Background technique [0002] "Food is the paramount necessity of the people". At present, the safety of meat food has become a global issue, which is directly related to the health of the people and the prosperity of the nation. How to identify the quality of meat has become the focus and difficulty of food market management. In the 1990s, a new device-electronic nose (also known as an odor scanner) that simulates the biological olfactory system by combining gas sensors and pattern recognition technology to realize the detection and identification of volatile substances appeared. Its core component is a gas sensor, which has the advantages of being objective, fast and repeatable. [0003] In the development of the electronic nose, the selection and application of the gas sensor array is a key ...

Claims

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Application Information

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IPC IPC(8): G01N5/02
Inventor 谷宇韩健梁星
Owner 中安高科检测科技(北京)有限公司
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