A kind of preparation method for 2-hexenal adsorption color development film
A technology of hexenal and color film, which is applied in the direction of material analysis, instruments, and measuring devices through observation of the influence on chemical indicators, can solve the problems of complicated and cumbersome analysis processes, and achieve simple synthesis methods, easy operation, and detection short time effect
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Embodiment 1
[0028] (1) 5.321 g of polyvinyl alcohol (PVA1799 99%, M) at 90 ° C W = 74885) Dissolved in 40 ml deionized water, 10 ml of anhydrous ethanol was added to 50 ° C, and the constant temperature magnetic force was dissolved to obtain a cast film solution. 5 ml of a 10 ml syringe was extracted onto a dry cleansing petriper, and a 45 ° C oven was placed into a PVA film.
[0029] (2) 0.0175 g of a mixture of 0.0175 g of methyl red sodium sodium salt in 25 ml of water, 21 ml of methanol was accurately weighed. 1.6 ml of aldehyde indicator was added dropwise on the PVA film and dried to give the color film. The aldehyde indicator is used 0.08 ml per square centimeter.
[0030] (3) The resulting color film was suspended to 50 μl of 89.47 mg / ml2-hexenol solution and the control sensing distance was 0.7 cm, and the ambient temperature was 65 ° C for 30 min. Such as figure 1 As shown, the adsorption is yellow, and there is a red spotted production after adsorption.
Embodiment 2
[0032] This example is intended to illustrate the drawing of the 2-hexendehyde standard curve of the color film.
[0033] The standard solution to which the concentration gradient contains 2-hexendehyde, wherein the 2-hexendehyde concentration is 20, 40, 60, 80, 100, 120, 140, 160, 140, 200 mg / ml. The color formation film of Example 1 was suspended to 50 μL of the above-described standard solution and the sensing distance was 0.7 cm, and the ambient temperature was 60 min at ambient temperature at 65 ° C.
[0034] The color of 2-hexenol response is analyzed by image J software. The specific steps are as follows: Select the same energy containing the measurement area of all color coloration regions, and sequentially determines the same as the same color film culture dish before adsorption and adsorption The average gradation value before and after the adsorption of each color film was obtained. The average gradation values obtained before the adsorption membrane adsorption we...
Embodiment 3
[0036] (1) 6.315 g of polyvinyl alcohol (PVA1799) was dissolved in 45 ml of deionized water at 90 ° C, and 15 ml of anhydrous ethanol was cooled to 50 ° C, and the constant temperature magnetic force was stirred for 2 h and dissolved to obtain a cast film solution. 5 ml of a 10 ml syringe was extracted onto a dry cleansing petriper, and a 45 ° C oven was placed into a PVA film.
[0037] (2) 0.0175 g of a mixture of 0.0175 g of methyl red sodium sodium salt in 25 ml of water, 21 ml of methanol was accurately weighed. 1.6 ml of aldehyde indicator was added dropwise on the PVA film and dried to give the color film. The aldehyde indicator is used 0.08 ml per square centimeter.
[0038](3) The obtained color film was suspended to 50 μL of 180 mg / ml 2-hexenol solution and the sensing distance was 0.7 cm, and the ambient temperature was 60 min at 65 ° C.
[0039] The color spots were collected and treated against the color spots in a period of time (adsorption time: 0-60min, interval: ...
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