Method for on-line fluorescence detection of water form in soil cultural relics

A technology for soil cultural relics and fluorescence detection, which is applied in the direction of fluorescence/phosphorescence, measuring devices, and material analysis through optical means, and can solve the problems that it is difficult to grasp the form and content of moisture in soil cultural relics in real time

Active Publication Date: 2021-10-22
XIAN UNVERSITY OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a method for online fluorescence detection of volatilization of different forms of water in soil cultural relics, so as to solve the problem that it is difficult to grasp the form and content of water in soil cultural relics in real time in the prior art

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  • Method for on-line fluorescence detection of water form in soil cultural relics
  • Method for on-line fluorescence detection of water form in soil cultural relics
  • Method for on-line fluorescence detection of water form in soil cultural relics

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Effect test

preparation example Construction

[0033] 2. Preparation of simulated samples of water-containing soil cultural relics: due to the non-renewability and preciousness of cultural relics, the simulated samples of soil cultural relics were used instead of actual cultural relics. The simulated samples were pressed by molds to obtain cylindrical simulated soil samples with a diameter of 1 cm and a height of 0.8 cm. In order to evaluate the changes of different water forms before and after the reinforcement of soil cultural relics, tetraethyl orthosilicate hydrolysis and condensation solution was used as a reinforcement agent, which was added to the simulated soil sample by drip infiltration, and then sealed at room temperature for 4 hours to obtain the reinforced soil sample. In order to make the unreinforced and reinforced soil samples contain a certain amount of water, the simulated soil samples before and after reinforcement were placed in a water vapor container to absorb moisture for 2-8 hours, so as to obtain unr...

Embodiment 1

[0037] Add 6.8014g of o-hydroxyacetophenone, 10.600g of p-diethylaminobenzaldehyde, 75mL of absolute ethanol and 15mL of 50% KOH solution into a 250mL round bottom flask in sequence, heat, stir and reflux for 1h, and place for 10h. Then pour it into 150mL of secondary water, and neutralize it with hydrochloric acid, let it cool down, lower the temperature, and precipitate out. The precipitate was filtered and vacuum dried to obtain chalcone. Add 1.5 g of the chalcone synthesized above to a 150 mL round bottom flask containing 50 mL of absolute ethanol, then slowly add 5 mL of 20% NaOH solution under vigorous stirring, and then carefully add 18 mL of 15% hydrogen peroxide solution within 0.5 h. The reaction mixture was stirred at 30° C. for 3.5 h, then poured into 100 mL of secondary water, neutralized with hydrochloric acid, allowed to cool down, and precipitated out. The precipitate was filtered, washed three times with secondary water, and dried naturally to obtain the fluo...

Embodiment 2

[0042] The preparation method of the probe and the simulated soil sample in this example are as in Example 1.

[0043] The consolidated soil sample was placed in a water vapor container for moisture absorption for 2 hours, thereby obtaining a consolidated soil sample containing moisture. Then introduce the acetone solution of 200mL FE into the water-containing reinforced soil sample, and measure the fluorescence emission spectrum of the soil sample at different times. The results are as follows: image 3 shown. It can be seen from the figure that the characteristic fluorescence peak with a wavelength of about 520nm is the response of free water in the soil sample, and the characteristic fluorescence peak with a wavelength of about 570nm is the response of bound water in the soil sample. Under the same condition of moisture absorption time, compared figure 2 The volatile water form of the unreinforced soil sample changes at different times. It can be seen that the correspond...

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Abstract

The invention discloses a method for on-line fluorescence detection of a water form in a soil cultural relic. The method comprises the following steps: introducing an FE fluorescent probe into a detected soil cultural relic, detecting a fluorescence spectrum of the soil cultural relic marked by the FE fluorescent probe, and identifying free water and bound water in the soil cultural relic according to the position and change of a characteristic peak in the fluorescence detection spectrum. The method has great significance in evaluating the water physical property of the soil cultural relics. According to the method, FE (4-diethylamino-3-hydroxyflavone) is used as a fluorescent probe, FE is a fluorescent probe sensitive to the water form, the fluorescent probe has a long excitation wavelength (400nm), the defect that the fluorescence intensity of a soil sample is reduced due to absorption generally existing in the soil sample during ultraviolet excitation is overcome, and the method has wide adaptability.

Description

technical field [0001] The invention belongs to the field of protection and detection of cultural relics, and in particular relates to a method for online fluorescence detection of water forms in soil cultural relics. Background technique [0002] The type of water in soil cultural relics has an important impact on the long-term preservation of cultural relics, and most of its diseases originate from water erosion. There are many types of water in soil cultural relics, such as free water (also known as gravity water), bound water (also known as adsorbed water or hygroscopic water), etc., which are closely related to the occurrence and development of soil cultural relics diseases. The weathering resistance of soil cultural relics is closely related to its water content and water form. Under the condition of the same water content, there is more free water, which is easy to keep the soil cultural relics dry, which is beneficial to the weathering of the soil cultural relics, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/643Y02A90/30
Inventor 郑丽珍胡道道裴书研张天社崔林王叶
Owner XIAN UNVERSITY OF ARTS & SCI
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