Method for the quantitative analysis of the surface bloom of a tyre

Abstract

The present application belongs to the field of chemical detection and analysis, and particularly relates to a quantitative analysis method of tire surface spray substances. The quantitative analysis method of tire surface spray substances comprises the following steps: S1. establishing a standard curve; S2. pretreating a to-be-tested sample; S3. qualitatively analyzing the to-be-tested sample; S4. calculating the concentration of 6PPD in the to-be-tested sample; and S5. quantitatively analyzing each component of the to-be-tested sample. The present application provides a reasonable and rapid quantitative analysis method of tire surface spray substances, which can more effectively qualitatively and quantitatively analyze tire surface spray substances, provide basic data basis for optimizing a formula and adjusting a process, save unnecessary multiple formula and process adjustment tests, and improve experimental efficiency.

Description

Technical Field

[0001] This invention belongs to the field of chemical detection and analysis, specifically relating to a quantitative analysis method for blooming substances on tire surfaces. Technical Background

[0002] According to relevant literature, blooming is a long-standing problem in the tire industry, and no effective solution has been proposed to date. Furthermore, no reports have been found regarding quantitative analysis methods.

[0003] Antioxidant 4020 migrates to the tire surface, causing a reddish-brown discoloration due to UV exposure. Protective wax also migrates to the tire surface, forming a wax film, both of which affect the tire's appearance. Therefore, it is necessary to investigate the causes of this blooming phenomenon, adjust tire storage conditions, and improve tire blooming to enhance customer satisfaction.

[0004] Because the laboratory only has qualitative analysis methods for blooming substances, but no quantitative analysis methods for blooming substances, and quantitative analysis methods can provide more effective data analysis basis for material formulation adjustment and improve blooming phenomenon.

[0005] In existing analytical techniques for rubber blooming substances, gas chromatography-mass spectrometry (GC-MS) is commonly used for qualitative analysis. For the quantitative analysis of known components, traditional methods mainly rely on external standard or internal standard methods. However, blooming substances are often mixtures of various compounding agents (such as antioxidants, accelerators, paraffin, etc.) with different properties. Using a strict internal standard method to accurately quantify all components has significant limitations in practice: firstly, it is difficult to find a universal internal standard that simultaneously matches the chemical properties of all components, is suitable for the established method conditions, and is not present in the sample; secondly, establishing a separate external standard curve for each substance is not only costly and cumbersome, but also fails to find matching standards for unknown or unidentified components found in the spectral library. Due to the lack of standards, it is impossible to establish an external standard quantitative method, thus making accurate quantitative analysis of all blooming components difficult.

[0006] Therefore, there is an urgent need to provide a quantitative analysis method for blooming substances on tire surfaces. Establishing a quantitative analysis method for blooming substances can identify materials that are prone to blooming and determine the content of each substance in the bloom, providing a theoretical basis for the material formulation department to improve the blooming problem. Summary of the Invention

[0007] To address the lack of a quantitative analysis method for blooming substances on tire surfaces in existing technologies, this invention provides a quantitative analysis method for blooming substances on tire surfaces.

[0008] The specific solution of the present invention is as follows:

[0009] A quantitative analysis method for blooming substances on tire surfaces includes the following steps: S1. Establishing a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample. Standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using absorbent cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 5-6 ml of chloroform to glass test tube No. 1, sonicate for 4-6 min, transfer the solution to glass test tube No. 2, add 5-6 ml of chloroform to glass test tube No. 1 again, sonicate for 4-6 min, transfer the solution to glass test tube No. 2, repeat 3-5 times until the solution is clear; use a nitrogen dryer to blow nitrogen into glass test tube No. 2 to evaporate the chloroform, obtaining the blooming material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the blooming material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample to be tested: Analyze the peak area A6PPD of 6PPD based on the total ion chromatogram obtained in step S3, and calculate the concentration C6PPD of 6PPD in the sample to be tested using the external standard method based on the standard curve in step S1. S5. Quantitative analysis of other components of the sample: Using 6PPD as an internal standard, analyze the peak areas Ai of other components of the sample based on the total ion chromatogram obtained in step S3, and use the formula... Calculate the concentration M of each of the other components in the sample to be tested.

[0010] In step S1, 6PPD is dissolved in chloroform to prepare standard solutions of different concentrations.

[0011] The GC-MS analysis conditions for the standard solution in step S1 are the same as those for the GC-MS analysis conditions for the sample to be tested in step S3. The chromatographic conditions are: injection port temperature 250℃, temperature program: initial temperature 100℃, hold for 1 min, increase to 300℃ at 10 kJ / min, hold for 10 min, flow rate 1 ml / min, and mass spectrometry conditions: ion source temperature 230℃.

[0012] The GC-MS detection and analysis conditions for the standard solution in step S1 and the scanning mode for the GC-MS detection and analysis of the sample to be tested in step S3 are both in full scan mode.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: Currently, there is no quantitative analysis method for tire surface blooming substances, and it is impossible to identify the content of tire surface blooming substances per unit area; the present invention provides a reasonable and rapid quantitative analysis method for tire surface blooming substances, which can more effectively perform qualitative and quantitative analysis of substances sprayed from the tire surface, providing basic data for optimizing formulas and adjusting processes, saving unnecessary multiple formula and process adjustment experiments, and improving experimental efficiency. Detailed Implementation

[0014] The present invention will be further described below through specific embodiments, but the embodiments of the present invention are not limited thereto.

[0015] A quantitative analysis method for blooming substances on tire surfaces includes the following steps: S1. Establishing a standard curve: 6PPD (CG) with a purity greater than 98% was selected as the standard sample. Standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using absorbent cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 5-6 ml of chloroform to glass test tube No. 1, sonicate for 4-6 min, transfer the solution to glass test tube No. 2, add 5-6 ml of chloroform to glass test tube No. 1 again, sonicate for 4-6 min, transfer the solution to glass test tube No. 2, repeat 3-5 times until the solution is clear; use a nitrogen dryer to blow nitrogen into glass test tube No. 2 to evaporate the chloroform and obtain the blooming material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the blooming material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD The concentration C of 6PPD in the sample was calculated using the external standard method based on the standard curve from step S1. 6PPD ; S5. Quantitative analysis of other components of the sample: Using 6PPD as an internal standard, analyze the peak areas A of other components of the sample based on the total ion chromatogram obtained in step S3. i Using the formula Calculate the concentration M of each of the other components in the sample to be tested.

[0016] Furthermore, in step S1, 6PPD is dissolved in chloroform to prepare standard solutions of different concentrations.

[0017] Furthermore, the GC-MS detection and analysis conditions for the standard solution in step S1 are the same as those for the GC-MS detection and analysis conditions for the sample to be tested in step S3. The chromatographic conditions are: injection port temperature 250℃, temperature program: initial temperature 100℃, hold for 1 min, increase to 300℃ at 10 kJ / min, hold for 10 min, flow rate 1 ml / min, and mass spectrometry conditions: ion source temperature 230℃.

[0018] Furthermore, the GC-MS detection and analysis conditions for the standard solution in step S1 and the scanning mode for the GC-MS detection and analysis of the sample to be tested in step S3 adopt the full scan mode. Example 1

[0019] This invention provides a quantitative analysis method for blooming substances on tire surfaces and evaluates the accuracy of this quantitative analysis method.

[0020] 1. Establish a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample. Standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. 2. Sample pretreatment: Prepare CTP anti-scorching agent at concentrations of 100ppm, 200ppm, and 300ppm respectively, and transfer them to sample bottles ①, ②, and ③ respectively. Add 6PPD standard sample at a concentration of 0.14mg / ml to sample bottles ①, ②, and ③ respectively to obtain sample ①, sample ②, and sample ③ to be tested. 3. Perform GC-MS detection on samples ①, ②, and ③ after pretreatment in step 2 to obtain total ion chromatograms for each sample. Based on the total ion chromatograms, obtain the mass spectra of each component of the sample. Match and compare the mass spectra with the data in the mass spectral library to distinguish the scorching inhibitor CTP and 6PPD in the sample. 4. Quantitative analysis: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD And the peak area A of the anti-scorching agent CTP i Among them, the peak area A of 6PPD corresponding to sample ① is... 6PPD The peak area A of the anti-scorching agent CTP is 1902809.42. i The peak area A of 6PPD corresponding to sample No. ② is 1475800.35. 6PPD The peak area A of the anti-scorching agent CTP is 1902903.31. i The value is 2748112.7; the peak area A of 6PPD corresponding to sample No. ③ is... 6PPD The peak area A of 1902783.11 and the anti-scorching agent CTP i The value is 4082201.05; using the formula The concentrations M of the anti-scorching agent CTP in test samples ①, ②, and ③ were calculated to be 108 ppm, 201 ppm, and 299 ppm, respectively.

[0021] Based on the above test results, it can be seen that the quantitative analysis method for tire surface blooming material provided by the present invention has a small error between the measured value and the true value, indicating that the quantitative analysis method can accurately reflect the content of each component in the tire surface blooming material. It can be used to quantitatively analyze the content of each component in the tire surface blooming material, providing data support for the optimization of material formulation.

[0022] This invention provides a quantitative analysis method for blooming substances on tire surfaces, which confirms the pretreatment conditions of the test sample to ensure complete extraction of blooming substances, thereby improving the measurement accuracy of the quantitative analysis method for blooming substances on tire surfaces. Example 2

[0023] S1. Establishing a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample, and standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared respectively. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using degreased cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 3 ml of chloroform to glass test tube No. 1, sonicate for 1 min, transfer the solution to glass test tube No. 2, add 3 ml of chloroform to glass test tube No. 1 again, sonicate for 1 min, transfer the solution to glass test tube No. 2; use a nitrogen blower to blow nitrogen into glass test tube No. 2 to evaporate the chloroform and obtain the sprayed material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the sprayed material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD The concentration of 6 PPD in the sample was calculated using the external standard method based on the standard curve from step S1, given a value of 406070.69. 6PPD It is 0.035 mg / ml; S5. Quantitative analysis of antioxidant TMQ in the sample: Using 6PPD as an internal standard, the peak area A of antioxidant TMQ in the sample was analyzed based on the total ion chromatogram obtained in step S3. i The value is 16650.69, using the formula. The concentration M in the sample was calculated to be 0.001 mg / ml. Example 3

[0024] S1. Establishing a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample, and standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared respectively. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using degreased cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 5 ml of chloroform to glass test tube No. 1, sonicate for 2 minutes, transfer the solution to glass test tube No. 2, add 5 ml of chloroform to glass test tube No. 1 again, sonicate for 2 minutes, transfer the solution to glass test tube No. 2; repeat once; use a nitrogen dryer to blow nitrogen into glass test tube No. 2 to evaporate the chloroform and obtain the sprayed material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the sprayed material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD The concentration C of 6PPD in the sample was calculated using the external standard method based on the standard curve from step S1, given the value as 557775.20. 6PPD It is 0.045 mg / ml; S5. Quantitative analysis of antioxidant TMQ in the sample: Using 6PPD as an internal standard, the peak area A of antioxidant TMQ in the sample was analyzed based on the total ion chromatogram obtained in step S3. i The value is 42762.58. Using the formula... The concentration M of antioxidant TMQ in the sample was calculated to be 0.003 mg / ml. Example 4

[0025] S1. Establishing a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample, and standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared respectively. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using degreased cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 5 ml of chloroform to glass test tube No. 1, sonicate for 3 minutes, transfer the solution to glass test tube No. 2, add 5 ml of chloroform to glass test tube No. 1 again, sonicate for 3 minutes, transfer the solution to glass test tube No. 2; repeat twice; use a nitrogen dryer to blow nitrogen into glass test tube No. 2 to evaporate the chloroform and obtain the sprayed material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the sprayed material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD The value was 763330.68. The concentration C of 6PPD in the sample was calculated using the external standard method based on the standard curve from step S1.6PPD It is 0.060 mg / ml; S5. Quantitative analysis of antioxidant TMQ in the sample: Using 6PPD as an internal standard, the peak area A of antioxidant TMQ in the sample was analyzed based on the total ion chromatogram obtained in step S3. i The value is 77152.04. Using the formula... The concentration M of antioxidant TMQ in the sample was calculated to be 0.006 mg / ml. Example 5

[0026] S1. Establishing a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample, and standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared respectively. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using degreased cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 5 ml of chloroform to glass test tube No. 1, sonicate for 4 min, transfer the solution to glass test tube No. 2, add 5 ml of chloroform to glass test tube No. 1 again, sonicate for 4 min, transfer the solution to glass test tube No. 2; repeat 3 times; use a nitrogen blower to blow nitrogen into glass test tube No. 2 to evaporate the chloroform and obtain the sprayed material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the sprayed material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD The value was 915330.68. The concentration C of 6PPD in the sample was calculated using the external standard method based on the standard curve from step S1. 6PPD It is 0.070 mg / ml; S5. Quantitative analysis of antioxidant TMQ in the sample: Using 6PPD as an internal standard, the peak area A of antioxidant TMQ in the sample was analyzed based on the total ion chromatogram obtained in step S3. i The value is 120152.04. Using the formula... The concentration M of antioxidant TMQ in the sample was calculated to be 0.009 mg / ml. Example 6

[0027] S1. Establishing a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample, and standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared respectively. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using degreased cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 5 ml of chloroform to glass test tube No. 1, sonicate for 5 min, transfer the solution to glass test tube No. 2, add 5 ml of chloroform to glass test tube No. 1 again, sonicate for 5 min, transfer the solution to glass test tube No. 2; repeat 4 times; use a nitrogen dryer to blow nitrogen into glass test tube No. 2 to evaporate the chloroform and obtain the sprayed material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the sprayed material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD The value was 925330.68. The concentration C of 6PPD in the sample was calculated using the external standard method based on the standard curve from step S1. 6PPD It was 0.071 mg / ml; S5. Quantitative analysis of antioxidant TMQ in the sample: Using 6PPD as an internal standard, the peak area A of antioxidant TMQ in the sample was analyzed based on the total ion chromatogram obtained in step S3. i The value is 120262.04. Using the formula... The concentration M of antioxidant TMQ in the sample was calculated to be 0.009 mg / ml. Example 7

[0028] S1. Establishing a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample, and standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared respectively. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using degreased cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 6 ml of chloroform to glass test tube No. 1, sonicate for 6 min, transfer the solution to glass test tube No. 2, add 6 ml of chloroform to glass test tube No. 1 again, sonicate for 6 min, transfer the solution to glass test tube No. 2; repeat 5 times; use a nitrogen blower to blow nitrogen into glass test tube No. 2 to evaporate the chloroform and obtain the blooming material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the blooming material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD The concentration of 6 PPD in the sample was calculated using the external standard method based on the standard curve from step S1, with a value of 938030.32. 6PPD It is 0.072 mg / ml; S5. Quantitative analysis of antioxidant TMQ in the sample: Using 6PPD as an internal standard, the peak area A of antioxidant TMQ in the sample was analyzed based on the total ion chromatogram obtained in step S3. i The value is 120159.86. Using the formula... The concentration M of antioxidant TMQ in the sample was calculated to be 0.009 mg / ml.

[0029] By optimizing the extraction parameters by adding different volumes of chloroform, sonication time, and number of repetitions, the optimal recovery rate of blooming material on tire surfaces can be obtained. Based on the above tests, it can be determined that the optimal recovery rate of blooming material on tire surfaces can be obtained by adding 5-6 ml of chloroform, sonicating for 4-6 min, transferring the solution to glass test tube No. 2, adding 5-6 ml of chloroform to glass test tube No. 1, sonicating for 4-6 min, and repeating 3-5 times.

[0030] For those skilled in the art, various corresponding modifications can be made based on the above technical solutions and concepts, and all such modifications should be included within the scope of protection of the claims of this invention.

Claims

1. A method for quantitative analysis of blooming substances on tire surfaces, characterized in that, Includes the following steps: S1. Establishing a standard curve: 6PPD with a purity greater than 98% was selected as the standard sample. Standard solutions with concentrations of 0.01ppm, 0.03ppm, 0.05ppm, 0.1ppm, and 0.3ppm were prepared. The standard solutions of different concentrations were detected by GC-MS, and the standard curve of peak area versus concentration was plotted. S2. Sample Pretreatment: Gently wipe the sprayed material from the tire surface using absorbent cotton soaked in chloroform, and place the cotton into glass test tube No. 1; add 5-6 ml of chloroform to glass test tube No. 1, sonicate for 4-6 min, transfer the solution to glass test tube No. 2, add 5-6 ml of chloroform to glass test tube No. 1 again, sonicate for 4-6 min, transfer the solution to glass test tube No. 2, repeat 3-5 times until the solution is clear; use a nitrogen dryer to blow nitrogen into glass test tube No. 2 to evaporate the chloroform, obtaining the blooming material; add 1 ml of chloroform to glass test tube No. 2 to dissolve the blooming material, which is the sample to be tested; S3. Qualitative analysis of the sample to be tested: The sample to be tested after pretreatment in step S2 is subjected to GC-MS detection to obtain a total ion chromatogram. Based on the total ion chromatogram, the mass spectra of each component of the sample to be tested are obtained. The mass spectra are matched and compared with the data in the mass spectrometry library to distinguish the components of the sample to be tested. S4. Calculate the concentration of 6PPD in the sample: Analyze the peak area A of 6PPD based on the total ion chromatogram obtained in step S3. 6PPD The concentration C of 6PPD in the sample was calculated using the external standard method based on the standard curve from step S1. 6PPD ; S5. Quantitative analysis of other components of the sample: Using 6PPD as an internal standard, analyze the peak areas A of other components of the sample based on the total ion chromatogram obtained in step S3. i Using the formula Calculate the concentration M of each of the other components in the sample to be tested.

2. The method for quantitative analysis of blooming substances on tire surfaces as described in claim 1, characterized in that, In step S1, 6PPD is dissolved in chloroform to prepare standard solutions of different concentrations.

3. The method for quantitative analysis of blooming substances on tire surfaces as described in claim 2, characterized in that, The GC-MS analysis conditions for the standard solution in step S1 are the same as those for the GC-MS analysis conditions for the sample to be tested in step S3. The chromatographic conditions are: injection port temperature 250℃, temperature program: initial temperature 100℃, hold for 1 min, increase to 300℃ at 10 kJ / min, hold for 10 min, flow rate 1 ml / min, and mass spectrometry conditions: ion source temperature 230℃.

4. The method for quantitative analysis of blooming substances on tire surfaces as described in claim 3, characterized in that, The GC-MS detection and analysis conditions for the standard solution in step S1 and the scanning mode for the GC-MS detection and analysis of the sample to be tested in step S3 are both in full scan mode.