CO2 sensitive indicator and preparation method thereof

An indicator and sensitive technology, which can be used in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials. , to avoid blind operation and save the cost of instrument testing

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] At present, during the controlled atmosphere storage of fruits and vegetables, the CO in the storage environment 2 The detection mainly adopts the gas detector, which is difficult to operate, and the detection operation is affected by human factors. The speed of gas passing through the detection trachea varies from person to person, which brings inconvenience to the use.

Method used

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  • CO2 sensitive indicator and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0019] Add 0.001g of methyl red to 50% ethanol solution, mix and stir to obtain methyl red ethanol solution, add 0.002g of bromothymol blue to 5% ethanol solution, mix and stir to obtain bromothymol blue ethanol Solution: mix the above methyl red ethanol solution and bromothymol blue ethanol solution, add pure water with a pH value of 7 to 100g to obtain the product.

[0020] This indicator is suitable for CO in the environment 2 Rapid detection of content from 0 to 100%.

Embodiment 2

[0022] Add 0.021g of methyl red to 85% ethanol solution, mix and stir to obtain methyl red ethanol solution, add 0.025g of bromothymol blue to 60% ethanol solution, mix and stir to obtain bromothymol blue ethanol Solution: mix the above methyl red ethanol solution and bromothymol blue ethanol solution, add pure water with a pH value of 7 to 100g to obtain the product.

Embodiment 3

[0024] Add 0.013g methyl red to 65% ethanol solution and mix and stir to obtain methyl red ethanol solution, add 0.019g bromothymol blue to 40% ethanol solution and mix and stir to obtain bromothymol blue ethanol Solution: mix the above methyl red ethanol solution and bromothymol blue ethanol solution, add pure water with a pH value of 7 to 100g to obtain the product.

[0025] This indicator is suitable for CO in the environment 2 Rapid detection of content from 0 to 100%.

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Abstract

The invention provides a CO2 sensitive indicator and a preparation method thereof. The CO2 sensitive indicator comprises the following ingredients by mass percent: 0.001 to 0.021 percent of methyl red, 0.002 to 0.025 percent of bromothymol blue, 3 to 9 percent of ethanol and the balance being pure water with pH value of 7. The preparation method comprises the following steps: mixing ethanol and water to form a 50% to 85% ethanol solution a and a 5% to 60% ethanol solution b at room temperature; adding methyl red into the ethanol solution a, mixing and uniformly stirring to obtain a methyl red ethanol solution, adding bromothymol blue into the ethanol solution b, and mixing and uniformly stirring to obtain a bromothymol blue ethanol solution; and adding the methyl red ethanol solution and the bromothymol blue ethanol solution into the pure water with pH value of 7 to obtain the CO2 sensitive indicator. The indicator is suitable for repaid detection on CO2 with the content of 0 to 100 percent in an environment.

Description

technical field [0001] The invention relates to an indicator product, in particular to a CO 2 Sensitive indicator and its preparation method. Background technique [0002] At present, during the controlled atmosphere storage of fruits and vegetables, the CO in the storage environment 2 The detection mainly adopts the gas detector, which is difficult to operate, and the detection operation is affected by human factors. The speed of gas passing through the detection trachea varies from person to person, which brings inconvenience to the use. The object of the present invention is to provide a CO 2 Sensitive indicator that automatically detects CO in the storage environment 2 Concentration, no need for manual operation by the operator, greatly reducing the influence of human factors in the detection process, just put it in the storage environment, easy to use. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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