Method for enhancing photostability of folic acid
A technology of folic acid and chlorogenic acid, applied in the directions of pharmaceutical formulations, acid-containing food ingredients, organic active ingredients, etc., can solve the problems of limited industrial application and high cost of raw materials, achieve easy industrialization and application, enhance photostability, inhibit light Degradation effect
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Embodiment 1
[0023] Put the folic acid solution with a mass concentration of 1g / L and any of the cinnamic acid-ethanol solution or hydroxycinnamic acid derivative-ethanol solution with a mass concentration of 1g / L in a phosphate buffer solution with a pH of 6.0-8.0 Mix and adjust the mass ratio of folic acid and hydroxycinnamic acid derivatives or folic acid and cinnamic acid to 10:0.1 (100g folic acid: 1g hydroxycinnamic acid derivatives) with buffer to make folic acid-cinnamic acid mixture or folic acid-hydroxycinnamic acid Mixture of acid derivatives.
Embodiment 2
[0025] The folic acid solution with a mass concentration of 1 g / L and any one of the cinnamic acid-ethanol solution or hydroxycinnamic acid derivative-ethanol solution with a mass concentration of 1 g / L are mixed in a ratio of 10:1 (10 g of folic acid : 1 g of hydroxycinnamic acid derivatives) Folic acid, cinnamic acid and hydroxycinnamic acid derivatives are mixed in a buffer solution with a pH of 6.0 to 8.0 to prepare a folic acid-cinnamic acid mixture or a folic acid-hydroxycinnamic acid derivative mixture .
Embodiment 3
[0027] Get the sample of embodiment 1,2, compare with the folic acid solution of the same concentration in the mixed solution, irradiate 240 minutes under ultraviolet light, measure by fluorescence spectrometry at excitation wavelength be 360nm, the fluorescence intensity at emission wavelength is 445nm place, and with The fluorescence intensity after 240 minutes of folic acid irradiation alone was normalized, and the results were expressed as relative fluorescence intensity.
[0028] like figure 1 and 2 As shown, the fluorescence intensity of folic acid itself is almost negligible, and the fluorescence intensity is significantly enhanced under ultraviolet light irradiation, indicating that folic acid molecules are constantly broken and degraded under light irradiation. As the UV irradiation time was extended to 120 minutes, the increase of fluorescence intensity gradually slowed down; after 200 minutes of irradiation, the fluorescence intensity no longer increased, indicatin...
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