Preparation method of gel-type CO2 indicator
An indicator, gel-type technology, applied in the field of preparation of gel-type CO2 indicator, can solve the problems of high instrument cost, lack of universality, and non-permanent use of gas sensing components, avoiding blind operation, The effect of saving the cost of instrument testing
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[0014] Example 1
[0015] Prepare a 10% ethanol solution;
[0016] Weigh 0.07 methyl red and dissolve it in 100 mL ethanol solution to obtain methyl red ethanol solution for use;
[0017] Weigh 0.15g bromothymol blue and dissolve it in 100mL ethanol solution to obtain bromothymol blue ethanol solution for later use; measure 10mL methyl red ethanol solution and 50mL bromothymol blue ethanol solution and mix, dilute 10 times to obtain Indicator solution
[0018] Take 100mL of the prepared indicator solution in a beaker, add 3mL of glycerin, heat in a constant temperature water bath at 55°C, put in 2.2g of methylcellulose when the rated temperature is reached, take out the beaker and quickly stir it under a magnetic stirrer at a high speed. It forms a homogeneous methylcellulose solution. As the temperature drops slowly, the viscosity of the solution increases. The resistance of the rotor is getting bigger and bigger. Take it out when the rotor is not moving to get the finished produc...
Example Embodiment
[0020] Example 2
[0021] Prepare a 90% ethanol solution;
[0022] Weigh 0.12g of methyl red and dissolve it in 100 mL of ethanol solution to obtain methyl red ethanol solution for later use;
[0023] Weigh 0.08 g of bromothymol blue and dissolve it in 100 mL of ethanol solution to obtain bromothymol blue ethanol solution for use;
[0024] Measure 55 mL of methyl red ethanol solution and 15 mL of bromothymol blue ethanol solution and mix, dilute 10 times to obtain the indicator solution;
[0025] Take 100mL of the prepared indicator solution in a beaker, add 8mL of glycerin, and heat in a constant temperature water bath at 80°C. When it reaches the rated temperature, add 1.2g of methylcellulose, take out the beaker and quickly stir it under a magnetic stirrer at a high speed. It forms a homogeneous methylcellulose solution. As the temperature drops slowly, the viscosity of the solution increases. The resistance of the rotor is getting bigger and bigger. Take it out when the rotor is ...
Example Embodiment
[0026] Example 3
[0027] Prepare a 50% ethanol solution;
[0028] Weigh 0.09 g of methyl red and dissolve it in 100 mL of ethanol solution to obtain a methyl red ethanol solution for later use;
[0029] Weigh 0.12g bromothymol blue and dissolve it in 100mL ethanol solution to obtain bromothymol blue ethanol solution for later use;
[0030] Measure 25mL methyl red ethanol solution and 35mL bromothymol blue ethanol solution and mix, dilute 10 times to obtain indicator solution;
[0031] Take 100mL of the prepared indicator solution in a beaker, add 5mL of glycerin, heat in a constant temperature water bath at 80℃, put 1.5g of methylcellulose when it reaches the rated temperature, take out the beaker and quickly stir it under a magnetic stirrer at a high speed. It forms a homogeneous methylcellulose solution. As the temperature drops slowly, the viscosity of the solution increases. The resistance of the rotor is getting bigger and bigger. Take it out when the rotor is not moving to get...
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