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CO2 sensitive type indicator label manufacturing method

A technology of CO2 and indication, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, etc., which can solve the problems of lack of universal applicability, high cost of instruments, and the need for regular maintenance and repair. and other issues to achieve the effect of saving instrument testing costs and avoiding blind operation

Inactive Publication Date: 2014-10-01
天津市食品加工工程中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the known technology, the storage and air-conditioning preservation of fruits and vegetables mainly use instruments to detect CO in the environment. 2 For testing, testing personnel need to have a high level of education, and the cost of the instrument is too high, regular maintenance and repairs are required, and it is not universal

Method used

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  • CO2 sensitive type indicator label manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare a 10% ethanol solution;

[0018] Weigh 0.07 methyl red and dissolve in 100mL ethanol solution to obtain methyl red ethanol solution for subsequent use;

[0019] Weigh 0.15g bromothymol blue and dissolve in 100mL ethanol solution to obtain bromothymol blue ethanol solution for subsequent use;

[0020] Measure 10mL of methyl red ethanol solution and 50mL of bromothymol blue ethanol solution, mix them, and dilute 10 times to obtain indicator solution;

[0021] Take 100mL of the prepared indicator solution, add 3mL of glycerin, heat in a constant temperature water bath at 55°C, put in 2.2g of methyl cellulose when the rated temperature is reached, take it out and quickly stir it continuously at high speed under a magnetic stirrer to form uniform methyl cellulose prime solution. As the temperature decreases slowly, the viscosity of the solution increases. The resistance of the rotor is getting bigger and bigger, take it out when the rotor does not move, and get th...

Embodiment 2

[0026] Prepare a 90% ethanol solution;

[0027] Weigh 0.12g methyl red and dissolve in 100mL ethanol solution to obtain methyl red ethanol solution for later use;

[0028] Weigh 0.08g bromothymol blue and dissolve in 100mL ethanol solution to obtain bromothymol blue ethanol solution for subsequent use;

[0029] Measure 55mL of methyl red ethanol solution and 15mL of bromothymol blue ethanol solution, mix them, and dilute 10 times to obtain indicator solution;

[0030] Take 100mL of the prepared indicator solution, add 8mL of glycerin, heat it in a constant temperature water bath at 80°C, put in 1.2g of methyl cellulose when the rated temperature is reached, take it out and stir continuously at high speed under a magnetic stirrer to form uniform methyl cellulose prime solution. As the temperature decreases slowly, the viscosity of the solution increases. The resistance of the rotor is getting bigger and bigger, take it out when the rotor does not move, and get the indicator ...

Embodiment 3

[0033] Prepare a 50% ethanol solution;

[0034] Weigh 0.1g methyl red and dissolve in 100mL ethanol solution to obtain methyl red ethanol solution for later use;

[0035] Weigh 0.12g bromothymol blue and dissolve in 100mL ethanol solution to obtain bromothymol blue ethanol solution for subsequent use;

[0036] Measure 30mL of methyl red ethanol solution and 25mL of bromothymol blue ethanol solution, mix them, and dilute 10 times to obtain indicator solution;

[0037] Take 100mL of the prepared indicator solution, add 5mL of glycerin, heat in a constant temperature water bath at 80°C, put in 1.9g of methyl cellulose when the rated temperature is reached, take it out, and stir it continuously at high speed under a magnetic stirrer to form uniform methyl cellulose prime solution. As the temperature decreases slowly, the viscosity of the solution increases. The resistance of the rotor is getting bigger and bigger, take it out when the rotor does not move, and get the indicator ...

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Abstract

Provided is a CO2 sensitive type indicator label manufacturing method. An ethanol solution of 10%-90% is prepared; methyl red of 0.07-0.12 g dissolves in the ethanol solution of 100 mL, and a methyl red ethanol solution is obtained; bromothymol blue of 0.08-0.15 g dissolves in the ethanol solution of 100 mL, and a bromothymol blue ethanol solution is obtained; the methyl red ethanol solution of 10-55 mL and the bromothymol blue ethanol solution of 15-50 mL are mixed and are diluted tenfold, and an indicator solution is obtained; glycerinum is added and is heated in a water bath at constant temperature, methylcellulose of 1.2-2.2 g is thrown in when the glycerinum reaches the rated temperature, and the mixture is continuously stirred at a high speed to form an even methylcellulose solution; as the temperature decreases, the viscosity of the solution is increased; indicator membrane liquid is obtained; the indicator membrane liquid is scratched off on cotton fiber paper, air blasting and drying are carried out, and a CO2 sensitive type indicator label is obtained. The CO2 sensitive type indicator label is applicable to rapid detection with 0-100% CO2 content in environment.

Description

technical field [0001] The invention relates to an indicator product, in particular to a CO 2 A method for preparing a sensitive indicator label. Background technique [0002] In the known technology, the storage and air-conditioning preservation of fruits and vegetables mainly use instruments to detect CO in the environment. 2 For testing, testing personnel need to have a high level of education, and the cost of the instrument is too high, requiring regular maintenance and repairs, which is not universal. To develop a CO 2 Sensitive indicator labels are necessary. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art above, to provide a CO 2 A method for preparing a sensitive indicator label. [0004] The object of the present invention is achieved through the following process steps: [0005] Prepare an ethanol solution with a concentration of 10% to 90%; [0006] Weigh 0.07-0.12g methyl red and di...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 胡云峰崔瀚元贺业鑫
Owner 天津市食品加工工程中心
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