Quantitative analysis method for sodium ions in watermark glass and evaluation method for watermark of display screen glass

Abstract

The embodiment of the invention relates to the field of display equipment. The rapid quantitative analysis method for sodium ions in watermark glass comprises the following steps: measuring the area of a watermark in the watermark glass; dissolving the watermark substance in an aqueous solution to obtain a mixed solution, and then quantitatively analyzing the mixed solution by using a cation column to obtain the content of sodium ions; and calculating the sodium ion content per unit watermark area according to the sodium ion content and the watermark area. The display screen glass watermark evaluation method provided by the embodiment of the invention comprises the following steps: setting a standard value, comparing a measured value with the standard value, and quickly evaluating whether the display screen glass watermark is bad or not and the bad degree so as to guide and improve a display screen production process; the quantitative analysis results of the sodium ions in the watermark glass can be compared before and after improvement, so that the effectiveness of solving the watermark problem can be quickly identified; meanwhile, the method can also be used for production of daily display screen glass so as to quickly evaluate whether the product quality is qualified or not.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, and in particular to a method for quantitatively analyzing sodium ions in watermarked glass and a method for evaluating watermarks on display glass. Background Art

[0002] Commercial large screens and smart screens are currently mainly made of soda-lime glass, and the bonding methods of their products are empty bonding, zero bonding and full bonding. Due to the high price of full bonding, the current bonding methods are mainly empty bonding and zero bonding, so one side of the soda-lime glass in its products will be in contact with the air. According to the characteristics of soda-lime glass, due to its high sodium content, sodium ions will migrate to the surface of the glass, react with carbon dioxide, water vapor and other substances in the air to form sodium salts that adhere to the glass surface, resulting in various watermark problems on the glass. At present, the industry has no relevant methods to guide the improvement of glass watermark problems on display screens, nor can it identify the effectiveness of solving watermark problems. Summary of the invention

[0003] Based on this, the purpose of an embodiment of the present invention is to provide a quantitative analysis method for sodium ions in watermarked glass, which can provide guidance for the evaluation of poor glass watermarks on display screens and the improvement of display screen production processes, and can also compare the quantitative analysis results before and after the improvement to identify the effectiveness of solving the watermark problem.

[0004] In a first aspect, the method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0005] Prepare watermarked glass and measure the watermark area therein;

[0006] Placing the watermarked glass in a container, adding an aqueous solution into the container, and immersing the watermarked glass in the aqueous solution;

[0007] Separating the watermark material of the watermark glass and dissolving it in the aqueous solution to form a mixed solution;

[0008] Performing quantitative analysis on the mixed solution to obtain the sodium ion content;

[0009] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0010] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then quantitatively analyzed to obtain the content of sodium ions therein; the sodium ion content per unit watermark area can be calculated based on the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0011] As a preferred solution, in the aqueous solution of the embodiment of the present invention, the solute is an alcohol, and alcohol substances contain hydroxyl groups, which are easy to bind to sodium ions and can accelerate the dissolution of sodium salt. The alcohol is preferably isopropanol, which has the best effect on dissolving sodium salt.

[0012] As a preferred solution, in the aqueous solution of the embodiment of the present invention, the mass fraction of the solute is 8%-12%, and more preferably, the mass fraction of the solute is 10%. The mass fraction of 8%-12% can dissolve the sodium salt most efficiently. If the mass fraction is too low, the dissolution time is long, and if the mass fraction is too high, the cost is increased.

[0013] As a preferred solution, the method for separating the watermark material of the watermark glass in the embodiment of the present invention includes placing the container in a constant temperature oscillation device for oscillation treatment. The oscillation treatment allows the aqueous solution to fully contact the watermark glass, allowing the sodium salt to fully dissolve in the aqueous solution and reducing the dissolution time. In other embodiments, the watermark material of the watermark glass can also be separated by ultrasound or magnetic stirring.

[0014] As a preferred solution, the method for separating the watermark material of the watermarked glass in the embodiment of the present invention further comprises: heating in the constant temperature oscillation device, the heating temperature is 60°C-100°C, and the time is 1-2 hours. The temperature and time can most efficiently extract the sodium ions therein, and if the time is too long, the cost will increase.

[0015] As a preferred solution, the mixed solution in the embodiment of the present invention is filtered using a filter membrane to filter out particles with larger diameters, thereby avoiding clogging of the analysis equipment during subsequent quantitative analysis.

[0016] As a preferred solution, the pore size of the filter membrane in the embodiment of the present invention is not greater than 0.4 μm. After filtration with the filter membrane of this pore size, the particle size of the filtrate is relatively small, which is convenient for subsequent quantitative analysis.

[0017] As a preferred solution, the container in the embodiment of the present invention is a sealed container. Since the aqueous solution is volatile, the sealed container can avoid solution loss and ensure the accuracy of the test results; at the same time, the sealed container can avoid subsequent operations causing solution splashing and ensure the accuracy of the test results.

[0018] As a preferred solution, when the watermarked glass of the embodiment of the present invention is placed in the container, the watermark side faces upward and is placed parallel to the bottom of the container. In the watermarked glass, since the watermark is only on one side, the side with the watermark needs to face upward to facilitate the dissolution of the sodium salt; the watermarked glass is placed parallel to the bottom of the container to avoid the glass from being broken during subsequent operations.

[0019] In a second aspect, a display glass watermark evaluation method according to an embodiment of the present invention comprises the following steps:

[0020] Calculate the sodium ion content per unit watermark area using the sodium ion content and the watermark area as a measured value;

[0021] Set a standard value, which is the maximum allowable value of sodium ion content per unit watermark area of ​​the display glass;

[0022] The measured value is compared with the standard value. If the measured value is higher than the standard value, it is determined to be defective; if the measured value is not higher than the standard value, it is determined to be qualified.

[0023] The embodiment of the present invention compares the sodium ion content data per unit watermark area obtained by analysis with the standard data, and can quickly evaluate whether the glass watermark of the display screen is defective and the degree of the defect, so as to guide the improvement of the display screen production process. For different watermarked glasses, the larger the measured value, the more serious the degree of watermark defect. The quantitative analysis results of sodium ions in the watermarked glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem. At the same time, the method can also be used in the production of daily display screen glass to quickly evaluate whether the product quality is qualified. DETAILED DESCRIPTION

[0024] The method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0025] Prepare watermarked glass and measure the watermark area therein;

[0026] Prepare a container, the container can hold the watermarked glass, place the watermarked glass in the container, add an aqueous solution into the container, and immerse the watermarked glass in the aqueous solution;

[0027] Separating the watermark material of the watermark glass and dissolving it in the aqueous solution to form a mixed solution;

[0028] Taking out the watermarked glass from the container, filtering the mixed solution and performing quantitative analysis to obtain the sodium ion content;

[0029] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0030] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then filtered and the sodium ion content thereof is quantitatively analyzed; the sodium ion content per unit watermark area can be calculated according to the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by the analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0031] A display glass watermark evaluation method according to an embodiment of the present invention comprises the following steps:

[0032] Calculate the sodium ion content per unit watermark area using the sodium ion content and the watermark area as a measured value;

[0033] Set a standard value, which is the maximum allowable value of sodium ion content per unit watermark area of ​​the display glass;

[0034] The measured value is compared with the standard value. If the measured value is higher than the standard value, it is determined to be defective; if the measured value is not higher than the standard value, it is determined to be qualified.

[0035] The embodiment of the present invention compares the sodium ion content data per unit watermark area obtained by analysis with the standard data, and can quickly evaluate whether the glass watermark of the display screen is defective and the degree of the defect, so as to guide the improvement of the display screen production process. For different watermarked glasses, the larger the measured value, the more serious the degree of watermark defect. The quantitative analysis results of sodium ions in the watermarked glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem. At the same time, the method can also be used in the production of daily display screen glass to quickly evaluate whether the product quality is qualified.

[0036] Example 1

[0037] The method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0038] Prepare a 21.5-inch watermarked glass and measure the watermark area;

[0039] Prepare a container that does not contain any metal elements, is not soluble in isopropanol aqueous solution, is heat-resistant above 80°C, and is large enough to accommodate the watermarked glass; place the watermarked glass in the container, with the watermarked side facing upward and parallel to the bottom of the container; add isopropanol aqueous solution into the container, with the mass fraction of isopropanol being 9.5%-10%; immerse the watermarked glass in the isopropanol aqueous solution;

[0040] Prepare a constant temperature oscillation device, place the container in the constant temperature oscillation device, and heat it in a water bath at 75℃-80℃ for 1 hour to dissolve the sodium salt in the watermark glass to form a mixed solution;

[0041] Take out the watermarked glass from the container, and filter the mixed solution in the container using a filter membrane with a pore size of less than 0.4 μm;

[0042] The filtered mixed solution was quantitatively analyzed using a Dionex IC cation column to obtain the sodium ion content;

[0043] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0044] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then quantitatively analyzed using a cation column, which can efficiently and quickly separate the sodium ions and analyze their content; the sodium ion content per unit watermark area can be calculated based on the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by the analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0045] Specifically, the model of the Dionex IC cation column is CS12A.

[0046] Example 2

[0047] The method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0048] Prepare a 20-inch watermarked glass and measure the watermark area;

[0049] Prepare a container that does not contain any metal elements, is not soluble in isopropanol aqueous solution, is heat-resistant above 100°C, and has a size that can accommodate the watermarked glass; place the watermarked glass in the container, with the watermarked side facing upward and parallel to the bottom of the container; add isopropanol aqueous solution into the container, with the mass fraction of isopropanol being 8%-8.5%; immerse the watermarked glass in the isopropanol aqueous solution;

[0050] Prepare a constant temperature oscillation device, place the container in the constant temperature oscillation device, and heat it in a water bath at 95°C-100°C for 1 hour to dissolve the sodium salt in the watermark glass to form a mixed solution;

[0051] Take out the watermarked glass from the container, and filter the mixed solution in the container using a filter membrane with a pore size of less than 0.4 μm;

[0052] The filtered mixed solution was quantitatively analyzed using a Dionex IC cation column to obtain the sodium ion content;

[0053] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0054] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then quantitatively analyzed using a cation column, which can efficiently and quickly separate the sodium ions and analyze their content; the sodium ion content per unit watermark area can be calculated based on the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by the analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0055] Example 3

[0056] The method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0057] Prepare a 15-inch watermarked glass and measure the watermark area;

[0058] Prepare a container that does not contain any metal elements, is not soluble in isopropanol aqueous solution, is heat-resistant above 65°C, and is large enough to accommodate the watermarked glass; place the watermarked glass in the container, with the watermarked side facing upward and parallel to the bottom of the container; add isopropanol aqueous solution into the container, with the mass fraction of isopropanol being 11.5%-12%; immerse the watermarked glass in the isopropanol aqueous solution;

[0059] Prepare a constant temperature oscillation device, place the container in the constant temperature oscillation device, heat it in a water bath at 60°C-65°C for 1 hour, and ultrasonicate it at the same time to dissolve the sodium salt in the watermark glass to form a mixed solution;

[0060] Take out the watermarked glass from the container, and filter the mixed solution in the container using a filter membrane with a pore size of less than 0.4 μm;

[0061] The filtered mixed solution was quantitatively analyzed using a Dionex IC cation column to obtain the sodium ion content;

[0062] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0063] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then quantitatively analyzed using a cation column, which can efficiently and quickly separate the sodium ions and analyze their content; the sodium ion content per unit watermark area can be calculated based on the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by the analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0064] Example 4

[0065] The method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0066] Prepare a 20-inch watermarked glass and measure the watermark area;

[0067] Prepare a container that does not contain any metal elements and will not dissolve the n-propanol aqueous solution, is heat-resistant above 70°C, and has a size that can accommodate the watermarked glass; place the watermarked glass in the container, with the watermarked side facing upward and parallel to the bottom of the container; add n-propanol aqueous solution into the container, with the mass fraction of n-propanol being 10%-10.5%; immerse the watermarked glass in the n-propanol aqueous solution;

[0068] Prepare a constant temperature oscillation device, place the container in the constant temperature oscillation device, and heat it in a water bath at 65℃-70℃ for 1 hour to dissolve the sodium salt in the watermark glass to form a mixed solution;

[0069] Take out the watermarked glass from the container, and filter the mixed solution in the container using a filter membrane with a pore size of less than 0.4 μm;

[0070] The filtered mixed solution was quantitatively analyzed using a Dionex IC cation column to obtain the sodium ion content;

[0071] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0072] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then quantitatively analyzed using a cation column, which can efficiently and quickly separate the sodium ions and analyze their content; the sodium ion content per unit watermark area can be calculated based on the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by the analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0073] Example 5

[0074] The method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0075] Prepare a 22-inch watermarked glass and measure the watermark area;

[0076] Prepare a container that does not contain any metal elements, is not soluble in ethanol water solution, is heat-resistant above 95°C, and has a size that can accommodate the watermarked glass; place the watermarked glass in the container, with the watermarked side facing upward and parallel to the bottom of the container; add ethanol water solution into the container, with the mass fraction of ethanol being 10.5%-11.5%; immerse the watermarked glass in the ethanol water solution;

[0077] Prepare a constant temperature oscillation device, place the container in the constant temperature oscillation device, and heat it in a water bath at 85°C-95°C for 1 hour to dissolve the sodium salt in the watermark glass to form a mixed solution;

[0078] Take out the watermarked glass from the container, and filter the mixed solution in the container using a filter membrane with a pore size of less than 0.4 μm;

[0079] The filtered mixed solution was quantitatively analyzed using a Dionex IC cation column to obtain the sodium ion content;

[0080] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0081] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then quantitatively analyzed using a cation column, which can efficiently and quickly separate the sodium ions and analyze their content; the sodium ion content per unit watermark area can be calculated based on the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by the analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0082] Example 6

[0083] The method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0084] Prepare an 18-inch watermarked glass and measure the watermark area;

[0085] Prepare a container that does not contain any metal elements, is not soluble in isopropanol aqueous solution, is heat-resistant above 75°C, and is large enough to accommodate the watermarked glass; place the watermarked glass in the container, with the watermarked side facing upward and parallel to the bottom of the container; add isopropanol aqueous solution into the container, with the mass fraction of isopropanol being 8.5%-9%; immerse the watermarked glass in the isopropanol aqueous solution;

[0086] Prepare a constant temperature oscillation device, place the container in the constant temperature oscillation device, and heat it in a water bath at 70℃-75℃ for 2 hours to dissolve the sodium salt in the watermark glass to form a mixed solution;

[0087] Take out the watermarked glass from the container, and filter the mixed solution in the container using a filter membrane with a pore size of less than 0.4 μm;

[0088] The filtered mixed solution was quantitatively analyzed using a Dionex IC cation column to obtain the sodium ion content;

[0089] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0090] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then quantitatively analyzed using a cation column, which can efficiently and quickly separate the sodium ions and analyze their content; the sodium ion content per unit watermark area can be calculated based on the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by the analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0091] Example 7

[0092] The method for quantitative analysis of sodium ions in watermarked glass according to an embodiment of the present invention comprises the following steps:

[0093] Prepare a 10-inch watermarked glass and measure the watermark area;

[0094] Prepare a container that does not contain any metal elements, is not soluble in isopropanol aqueous solution, is heat-resistant above 85°C, and is large enough to accommodate the watermarked glass; place the watermarked glass in the container, with the watermarked side facing upward and parallel to the bottom of the container; add isopropanol aqueous solution into the container, with the mass fraction of isopropanol being 9%-9.5%; immerse the watermarked glass in the isopropanol aqueous solution;

[0095] Prepare a constant temperature oscillation device, place the container in the constant temperature oscillation device, and heat it in a water bath at 80℃-85℃ for 1.5 hours to dissolve the sodium salt in the watermark glass to form a mixed solution;

[0096] Take out the watermarked glass from the container, and filter the mixed solution in the container using a filter membrane with a pore size of less than 0.4 μm;

[0097] The filtered mixed solution was quantitatively analyzed using a Dionex IC cation column to obtain the sodium ion content;

[0098] The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

[0099] In the embodiment of the present invention, the sodium salt on the watermark glass is dissolved by an aqueous solution, wherein the sodium salt exists in the aqueous solution in the form of sodium ions to form a mixed solution; the mixed solution is then quantitatively analyzed using a cation column, which can efficiently and quickly separate the sodium ions and analyze their content; the sodium ion content per unit watermark area can be calculated based on the obtained sodium ion content and the measured watermark area. By comparing the sodium ion content measurement data obtained by the analysis with the standard data, it is possible to quickly evaluate whether the glass watermark of the display screen is bad and the degree of badness, so as to guide the improvement of the display screen production process, and the quantitative analysis results of the sodium ions of the watermark glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem.

[0100] Example 8

[0101] A display glass watermark evaluation method according to an embodiment of the present invention comprises the following steps:

[0102] The sodium ion content per unit watermark area is obtained as a measured value according to the quantitative analysis method for sodium ions in watermark glass described in any one of Examples 1 to 7;

[0103] Set a standard value, which is the maximum allowable value of sodium ion content per unit watermark area of ​​the display glass;

[0104] The measured value is compared with the standard value. If the measured value is higher than the standard value, it is determined to be defective; if the measured value is not higher than the standard value, it is determined to be qualified.

[0105] The embodiment of the present invention compares the sodium ion content data per unit watermark area obtained by analysis with the standard data, and can quickly evaluate whether the glass watermark of the display screen is defective and the degree of the defect, so as to guide the improvement of the display screen production process. For different watermarked glasses, the larger the measured value, the more serious the degree of watermark defect. The quantitative analysis results of sodium ions in the watermarked glass can also be compared before and after the improvement, so as to quickly identify the effectiveness of solving the watermark problem. At the same time, the method can also be used in the production of daily display screen glass to quickly evaluate whether the product quality is qualified.

[0106] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for quantitative analysis of sodium ions in watermarked glass, characterized in that: The steps include: Prepare watermarked glass and measure the watermark area therein; Placing the watermarked glass in a container, adding an aqueous solution into the container, and immersing the watermarked glass in the aqueous solution; Separating the watermark material of the watermark glass and dissolving it in the aqueous solution to form a mixed solution; Performing quantitative analysis on the mixed solution to obtain the sodium ion content; The sodium ion content per unit watermark area is calculated according to the sodium ion content and the watermark area.

2. According to the method for quantitative analysis of sodium ions in watermarked glass according to claim 1, it is characterized in that: The solutes in the aqueous solution include alcohols.

3. A method for quantitative analysis of sodium ions in watermarked glass according to claim 2, characterized in that: The aqueous solution is an isopropanol solution with a mass fraction of 8%-12%.

4. The method for quantitative analysis of sodium ions in watermarked glass according to claim 1, characterized in that: The method for separating the watermark material from the watermarked glass comprises: placing the container into a constant temperature shaking device for shaking treatment.

5. A method for quantitative analysis of sodium ions in watermarked glass according to claim 4, characterized in that: The method for separating the watermark material of the watermarked glass further comprises: heating in the constant temperature oscillation device, the heating temperature being 60° C.-100° C. and the time being 1-2 hours.

6. A method for quantitative analysis of sodium ions in watermarked glass according to claim 1, characterized in that: The mixed solution is filtered using a filter membrane before the quantitative analysis.

7. A method for quantitative analysis of sodium ions in watermarked glass according to claim 6, characterized in that: The pore size of the filter membrane is no greater than 0.4 μm.

8. The method for quantitative analysis of sodium ions in watermarked glass according to claim 1, characterized in that: The container is a closed container.

9. A method for quantitative analysis of sodium ions in watermarked glass according to claim 1, characterized in that: When the watermarked glass is placed in the container, the watermarked side faces upward and is placed parallel to the bottom of the container.

10. A method for evaluating watermarks on display glass, characterized in that: The following steps are involved: The sodium ion content per unit watermark area obtained by the method for quantitative analysis of sodium ions in watermark glass according to any one of claims 1 to 9 is used as a measured value; Set a standard value, which is the maximum allowable value of sodium ion content per unit watermark area of ​​the display glass; The measured value is compared with the standard value. If the measured value is higher than the standard value, it is determined to be defective; if the measured value is not higher than the standard value, it is determined to be qualified.