A gas chromatography packing and a method for preparing the same

Abstract

The present disclosure relates to a gas chromatography packing and a preparation method thereof, comprising the following steps: S1. adding a dispersant and a reaction solvent into a reaction container, and stirring until the dispersant is dissolved; S2. adding a monomer, a crosslinking agent, an initiator, an emulsifier, a pore-forming agent and an electrolyte into the system of S1, and reacting at 55-85 DEG C for 20-28 h to obtain a crude product; S3. washing and drying the crude product; S4. screening the dried crude product to obtain a gas chromatography packing; the mass ratio of the reaction solvent, the dispersant, the crosslinking agent, the initiator, the emulsifier, the pore-forming agent, the electrolyte and the monomer is respectively: 14-16:1, 0.08-0.16:1, 2-3:1, 0.04-0.08:1, 0.01-0.03:1, 4-8:1, 0.03-0.08:1. The gas chromatography packing obtained by the preparation method of the present disclosure has uniform size and good dispersity, is easy to separate by screening, has good repeatability, and can effectively improve the separation effect.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of fillers, in particular to a gas chromatography filler and a preparation method thereof. BACKGROUND

[0002] Gas Chromatography has become a widely used method for separating and analyzing mixtures after decades of development. The working principle is that the sample to be analyzed is introduced into the chromatographic column through the sample injector. The adsorption capacity of the stationary phase to each component of the sample is different, causing adsorption equilibrium between the two phases. After repeated adsorption and desorption, the components with weak adsorption capacity flow out of the column first, while the components with strong adsorption capacity in the stationary phase flow out later. After separation in the chromatographic column, each component is carried into the detector by the flowing carrier gas. Through signal conversion, the response signal of each component is recorded by the recording system to obtain the chromatogram. Finally, the retention time, peak height and peak area of each component chromatographic peak are used for qualitative and quantitative analysis.

[0003] As long as a substance can be vaporized without decomposition under the conditions allowed by the gas chromatograph, it can be measured by gas chromatography. For some thermally unstable substances or substances that are difficult to vaporize, chemical derivatization methods can still be used for gas chromatography analysis. Gas chromatography has been widely used in petrochemical industry, medicine and health, environmental monitoring, biochemistry, food detection and other fields. For example, in health testing, air and water pollutants such as volatile organic compounds, polycyclic aromatic hydrocarbons, benzene, toluene, benzopyrene, etc. are detected; residual organochlorine and organophosphorus pesticides in crops are detected; food additives such as benzoic acid are detected; biological materials such as amino acids, fatty acids, and vitamins in body fluids and tissues are detected; in medical testing, biological materials such as fatty acids, triglycerides, vitamins, and sugars in body fluids and tissues are analyzed; in pharmaceutical analysis, antiepileptic drugs, volatile components in Chinese patent medicines, and alkaloid drugs are measured.

[0004] Gas chromatographs have the following advantages: 1. High separation efficiency and fast analysis speed, for example, more than 200 chromatographic peaks can be separated from a gasoline sample in two hours, and general sample analysis can be completed in 20 minutes. 2. Small sample size and high detection sensitivity, for example, the sample size of a gas sample is 1 milliliter, the sample size of a liquid sample is 0.1 microliter, and the sample size of a solid sample is several micrograms. With appropriate detectors, impurities with a content of tens of millions to a few hundred millionths can be detected. 3. Good selectivity, can separate and analyze constant boiling mixtures, substances with similar boiling points, some isotopes, cis and trans isomers, optically active isomers, and ortho, meta, and para isomers. 4. Wide application range, although gas chromatography is mainly used to analyze various gases and easily volatile organic substances, but under certain conditions, it can also analyze high-boiling point substances and solid samples.

[0005] In gas chromatography analysis, the packing material is a key factor affecting the working efficiency of gas chromatography, but the pass rate of the prepared gas chromatography packing material is still low. For example, the current packing material preparation process has the problem of poor control of the particle size of the packing material. In actual application, the appropriate range of the particle size of the packing material is about 100-180 um, but in the synthesis process, the particle size is often too large or the yield is too low, or the entanglement between the packing particles is serious, which cannot be separated by screening, resulting in that the uniformity of the particle size of the packing material does not reach a good level. SUMMARY

[0006] Based on this, the purpose of the present disclosure is to improve the uniformity and dispersion of the size of the gas chromatography packing material, thereby improving the separation efficiency of the gas chromatography.

[0007] To achieve the above-mentioned purpose, the present disclosure provides a preparation method of a gas chromatography packing material, comprising the following steps:

[0008] S1. adding a dispersing agent and a reaction solvent in a reaction container, and stirring until the dispersing agent is dissolved;

[0009] S2. adding a monomer, a crosslinking agent, an initiator, an emulsifier, a pore-forming agent and an electrolyte in the system of S1, and reacting at 55-85℃ for 20-28h to obtain a crude product;

[0010] S3. washing and drying the crude product;

[0011] S4. screening the dried crude product to obtain a gas chromatography packing material;

[0012] The mass ratio of the reaction solvent, the dispersing agent, the crosslinking agent, the initiator, the emulsifier, the pore-forming agent, the electrolyte and the monomer is respectively: 14-16:1, 0.08-0.16:1, 2-3:1, 0.04-0.08:1, 0.01-0.03:1, 4-8:1, 0.03-0.08:1;

[0013] The monomer is selected from at least one of methyl methacrylate or ethyl methacrylate; and the crosslinking agent is selected from any one or a combination of any two of N,N'-methylene bisacrylamide, divinylbenzene or ethylene glycol dimethyl methacrylate.

[0014] Preferably, the reaction in step S2 is carried out at 70℃, and the reaction time is 24h;

[0015] The mass ratio of the reaction solvent, the dispersing agent, the crosslinking agent, the initiator, the emulsifier, the pore-forming agent, the electrolyte and the monomer is respectively: 15:1, 0.12:1, 2:1, 0.06:1, 0.02:1, 6:1, 0.05:1;

[0016] The porogen is selected from any one or a combination of any two of cyclohexane, dibutyl phthalate, n-heptane, cyclohexanol.

[0017] More preferably, the monomer is the ethyl methacrylate;

[0018] The crosslinking agent is the N,N'-methylene bisacrylamide and the ethylene glycol dimethyl methacrylate in a mass ratio of 1:1;

[0019] The porogen is the cyclohexane and the dibutyl phthalate in a mass ratio of 1:1.

[0020] Preferably, the reaction solvent is deionized water.

[0021] Preferably, the dispersant is selected from any one or a combination of any two of polyethylene glycol, carboxymethyl cellulose, sodium carboxymethyl cellulose.

[0022] Preferably, the initiator is selected from any one or a combination of any two of dodecanoyl peroxide, dicumyl peroxide, azobisisobutyronitrile.

[0023] Preferably, the emulsifier is selected from at least one of sodium dodecyl sulfonate or sodium dodecyl benzene sulfonate.

[0024] Preferably, the electrolyte is selected from any one or a combination of any two of sodium chloride, sodium polystyrene sulfonate, sodium polyacrylate, potassium carbonate.

[0025] To achieve the above-mentioned purpose, the disclosure also provides a gas chromatography packing prepared according to the preparation method of any one of the preceding.

[0026] Preferably, the particle size of the gas chromatography packing is 100-180 μm, the pore size is 30-50 nm, and the crosslinking degree is 30%.

[0027] The disclosed solution has the following beneficial effects:

[0028] By one-step reaction, the gas chromatography packing is directly obtained by suspension polymerization method using monomer, dispersant, initiator, emulsifier, porogen and electrolyte as raw materials. The obtained gas chromatography packing has uniform size and good dispersity, is easy to separate by screening, has good repeatability, and can effectively improve the separation effect. Moreover, the preparation method has the advantages of simple process, wide raw material source, low cost, mild reaction condition, fast reaction rate, high reaction efficiency, and is suitable for industrial production. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without any creative effort based on the provided drawings.

[0030] Figure 1 Microscope image of the gas chromatography packing in Example 1.

[0031] Figure 2 Pore size distribution graph of the gas chromatography packing in Example 1.

[0032] Figure 3 Separation graph of the gas chromatography packing in Example 1. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the embodiments in the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present disclosure.

[0034] <Example 1>

[0035] The present embodiment provides a preparation method of a gas chromatography packing, which is performed according to the following steps:

[0036] 1) Start mechanical stirring (350 rpm), add 2.4 g of dispersant carboxymethyl cellulose sodium into a 1000 mL three-necked flask, and add 300 mL of deionized water into the reaction container for reaction and stirring for 30 min;

[0037] 2) Add 20 g of monomer ethyl methacrylate, 40 g of crosslinking agent (mass ratio of 1:1 of N,N'-methylene bisacrylamide and ethylene glycol dimethyl methacrylate), 1.2 g of initiator lauryl peroxide, 0.4 g of emulsifier sodium dodecyl sulfonate, 120 g of porogen (mass ratio of 1:1 of cyclohexane and dibutyl phthalate), and 1 g of electrolyte polystyrene sodium sulfonate into the above system;

[0038] 3) Start condensate water, and raise the reaction temperature to 70°C. After 24 h of reaction, a crude product is obtained;

[0039] 4) Centrifugal wash the crude product with ethanol and deionized water for three times respectively;

[0040] 5) drying the crude product in step 4) at a drying temperature of 60°C for 6-20 h to obtain dried gas chromatography packing material, and sieving the dried gas chromatography packing material with 80 mesh, 100 mesh, 120 mesh, and 150 mesh stainless steel sieves.

[0041] <Example 2>

[0042] The present example provides a method for preparing gas chromatography packing material, which is performed according to the following steps:

[0043] 1) turning on mechanical stirring (at a speed of 350 rpm), adding 2.4 g of dispersant carboxymethyl cellulose sodium into a 1000 mL three-necked flask, adding 300 mL of deionized water into the reaction container for reaction, and stirring for 30 min;

[0044] 2) adding 20 g of monomer ethyl methacrylate, 40 g of crosslinking agent (N,N'-methylenebisacrylamide and ethylene glycol dimethyl acrylate at a mass ratio of 1:1 = 1:1), 1.2 g of initiator dodecanoyl peroxide, 0.4 g of emulsifier sodium dodecyl sulfonate, 120 g of porogen (cyclohexane and dibutyl phthalate at a mass ratio of 1:1), and 1 g of electrolyte polystyrene sulfonate sodium into the above system;

[0045] 3) turning on the condensate water, increasing the reaction temperature to 60°C, and obtaining a crude product after 24 h of reaction;

[0046] 4) centrifugally washing the crude product with ethanol and deionized water for three times each;

[0047] 5) drying the crude product in step 4) at a drying temperature of 60°C for 6-20 h to obtain dried gas chromatography packing material, and sieving the dried gas chromatography packing material with 80 mesh, 100 mesh, 120 mesh, and 150 mesh stainless steel sieves.

[0048] <Example 3>

[0049] The present example provides a method for preparing gas chromatography packing material, which is performed according to the following steps:

[0050] 1) turning on mechanical stirring (at a speed of 350 rpm), adding 2.4 g of dispersant carboxymethyl cellulose sodium into a 1000 mL three-necked flask, adding 300 mL of deionized water into the reaction container for reaction, and stirring for 30 min;

[0051] 2) Add 20g of monomer ethyl methacrylate, 40g of crosslinking agent (N,N'-methylenebisacrylamide and ethylene glycol dimethacrylate in a mass ratio of 1:1), 1.2g of initiator dodecyl peroxide, 0.4g of emulsifier sodium dodecyl sulfonate, 120g of porogen (cyclohexane and dibutyl phthalate in a mass ratio of 1:1) and 1g of electrolyte sodium polystyrene sulfonate to the above system;

[0052] 3) Turn on the cooling water and raise the reaction temperature to 80℃. After reacting for 24 hours, the crude product is obtained.

[0053] 4) Wash the crude product three times each with ethanol and deionized water by centrifugation;

[0054] 5) Dry the crude product in step 4) at a temperature of 60℃ for 6-20 h to obtain dried gas chromatography packing material. Then, sieve the dried gas chromatography packing material using stainless steel sieves of 80 mesh, 100 mesh, 120 mesh, and 150 mesh.

[0055] <Example 4>

[0056] This embodiment provides a method for preparing gas chromatography packing material, which is carried out according to the following steps:

[0057] 1) Turn on the mechanical stirrer (350 rpm), add 2.4 g of dispersant sodium carboxymethyl cellulose to a 1000 mL three-necked flask, add 300 mL of deionized water to the reaction vessel and stir for 30 min;

[0058] 2) Add 20g of monomer ethyl methacrylate, 40g of crosslinking agent (N,N'-methylenebisacrylamide and ethylene glycol dimethacrylate in a mass ratio of 1:1), 0.8g of initiator dodecyl peroxide, 0.4g of emulsifier sodium dodecyl sulfonate, 120g of porogen (cyclohexane and dibutyl phthalate in a mass ratio of 1:1) and 1g of electrolyte sodium polystyrene sulfonate to the above system;

[0059] 3) Turn on the cooling water and raise the reaction temperature to 70℃. After reacting for 24 hours, the crude product is obtained.

[0060] 4) Wash the crude product three times each with ethanol and deionized water by centrifugation;

[0061] 5) Dry the crude product in step 4) at a temperature of 60℃ for 6-20 h to obtain dried gas chromatography packing material. Then, sieve the dried gas chromatography packing material using stainless steel sieves of 80 mesh, 100 mesh, 120 mesh, and 150 mesh.

[0062] <Example 5>

[0063] The embodiment provides a preparation method of a gas chromatography packing, which is performed according to the following steps:

[0064] 1) mechanical stirring is started (at a rotating speed of 350 r / min), 2.4 g of dispersant sodium carboxymethyl cellulose is added into a 1000 mL three-necked flask, 300 mL of deionized water is added into a reaction container for reaction, and stirring is performed for 30 min;

[0065] 2) 20 g of monomer ethyl methacrylate, 40 g of crosslinking agent (N,N'-methylene bisacrylamide and ethylene glycol dimethyl methacrylate at a mass ratio of 1:1), 1.6 g of initiator dodecanoyl peroxide, 0.4 g of emulsifier sodium dodecyl sulfonate, 120 g of pore-forming agent (cyclohexane and dibutyl phthalate at a mass ratio of 1:1) and 1 g of electrolyte sodium polystyrene sulfonate are added into the system;

[0066] 3) condensate water is started, the reaction temperature is increased to 70 DEG C, and a crude product is obtained after 24 h of reaction;

[0067] 4) the crude product is washed by centrifugation with ethanol and deionized water for three times respectively;

[0068] 5) the crude product in step 4) is dried, the drying temperature is 60 DEG C, the drying time is 6-20 h, a dried gas chromatography packing is obtained, and the gas chromatography packing is sieved by using 80 mesh, 100 mesh, 120 mesh and 150 mesh stainless steel sieves.

[0069] <Comparative Example 1>

[0070] The comparative example provides a preparation method of a gas chromatography packing, which is performed according to the following steps:

[0071] 1) mechanical stirring is started (at a rotating speed of 350 r / min), 1.6 g of dispersant sodium carboxymethyl cellulose is added into a 1000 mL three-necked flask, 300 mL of deionized water is added into a reaction container for reaction, and stirring is performed for 30 min;

[0072] 2) 20 g of monomer ethyl methacrylate, 40 g of crosslinking agent (N,N'-methylene bisacrylamide and ethylene glycol dimethyl methacrylate at a mass ratio of 1:1), 1.2 g of initiator dodecanoyl peroxide, 0.4 g of emulsifier sodium dodecyl sulfonate, 120 g of pore-forming agent (cyclohexane and dibutyl phthalate at a mass ratio of 1:1) and 1 g of electrolyte sodium polystyrene sulfonate are added into the system;

[0073] 3) condensate water is started, the reaction temperature is increased to 70 DEG C, and a crude product is obtained after 24 h of reaction;

[0074] 4) the crude product is washed by centrifugation with ethanol and deionized water for three times respectively;

[0075] 5) drying the crude product of step 4) at a drying temperature of 60 °C for a drying time of 6-20 h to obtain dried gas chromatography packing material, and sieving the dried gas chromatography packing material with 80 mesh, 100 mesh, 120 mesh, and 150 mesh stainless steel sieves.

[0076] <Comparative Example 2>

[0077] The present comparative example provides a method for preparing a gas chromatography packing material, which is performed in the following steps:

[0078] 1) turning on mechanical stirring (at a speed of 350 rpm), and adding 3.2 g of dispersant carboxymethyl cellulose sodium into a 1000 mL three-necked flask, and adding 300 mL of deionized water into the reaction container for reaction and stirring for 30 min;

[0079] 2) adding 20 g of monomer ethyl methacrylate, 40 g of crosslinking agent (N,N'-methylenebisacrylamide and ethylene glycol dimethacrylate at a mass ratio of 1:1), 1.2 g of initiator dodecanoyl peroxide, 0.4 g of emulsifier sodium dodecyl sulfonate, 120 g of porogen (cyclohexane and dibutyl phthalate at a mass ratio of 1:1), and 1 g of electrolyte polystyrene sulfonate sodium into the above system;

[0080] 3) turning on the condensate water, and increasing the reaction temperature to 70 °C, and obtaining a crude product after 24 h of reaction;

[0081] 4) centrifugally washing the crude product with ethanol and deionized water for three times each;

[0082] 5) drying the crude product of step 4) at a drying temperature of 60 °C for a drying time of 6-20 h to obtain dried gas chromatography packing material, and sieving the dried gas chromatography packing material with 80 mesh, 100 mesh, 120 mesh, and 150 mesh stainless steel sieves.

[0083] <Test Example>

[0084] 1. Calculation of crosslinking degree

[0085] The crosslinking degree of the packing materials in the above examples and comparative examples is calculated according to the following formula.

[0086]

[0087] The results of the crosslinking degree of each example and comparative example are shown in Table 1.

[0088] Table 1. Crosslinking degree data

[0089] Crosslinking degree Example 1 33.3% Example 2 33.3% Example 3 33.3% Example 4 33.3% Example 5 33.3% Comparative Example 1 33.3% Comparative Example 2 33.3%

[0090] 2. Packing morphology

[0091] The morphology of the gas chromatography packing obtained in the above examples and comparative examples was observed by microscope.

[0092] The packing obtained in different examples and comparative examples was almost identical in appearance, all being white powder, and the particle size was distributed between 100-180 um, and a few large particles or fine powder were removed by screening.

[0093] Figure 1 The microscope image of the gas chromatography packing obtained in Example 1 is shown in Figure 1 It can be seen that the gas chromatography packing obtained according to Example 1 has good particle dispersion and uniform particle size distribution (particle size distribution is between 100-180 um).

[0094] 3. Pore size analysis The pore size distribution of the gas chromatography packing obtained in the above examples and comparative examples was calculated by BJH (Barret-Joyner-Halenda) method. Figure 2 The pore size distribution of the gas chromatography packing in Example 1 is shown in Figure 2 It can be seen from the results in

[0095] Table 2. Pore size data of examples and comparative examples

[0096] Pore diameter (nm) Example 1 14.25 Example 2 9.63 Example 3 8.25 Example 4 11.56 Example 5 10.48 Comparative Example 1 13.54 Comparative Example 2 12.56

[0097] 4. Separation effect

[0098] The packing prepared in the examples and comparative examples was loaded into a packed column of 1 m x 3.2 mm, and after aging of the packed column, methane, ethane-ethylene, acetylene, and propane were separated to test the separation effect of the packing.

[0099] The test instrument was GC9790Plus gas chromatograph, with FID detector + TCD detector. The instrument conditions were: carrier gas N2; constant flow 20 mL / min; column temperature: constant temperature 70℃; the spectrum obtained by testing is shown in Figure 3 According to the spectrum, the separation degree data was obtained, and the test was repeated three times to take the average value. Table 3 is the separation degree data of the packing in the examples and comparative examples.

[0100] Table 3. Test results of separation degree data of examples and comparative examples

[0101]

[0102] From the resolution data of examples 1, 2 and 3, it can be seen that the resolution of example 1 is not much different from that of the competitor, and the repeatability of example 1 is high. In addition, the reaction temperature has a significant effect on the separation performance of the filler. With the increase of temperature, the resolution shows a downward trend. From the resolution data of examples 1, 4 and 5, it can be seen that the amount of initiator also has an important influence on the separation performance of the filler. An appropriate amount of initiator can improve the resolution, but an excessive amount will lead to a decrease in resolution. From the resolution data of example 1 and comparative examples 1 and 2, it can be seen that the amount of dispersant is crucial to the dispersibility and separation performance of the filler. Insufficient amount of dispersant will cause the filler to stick together, thereby affecting the resolution; while too much dispersant may also adversely affect the separation performance.

[0103] The present disclosure directly realizes the gas chromatography filler obtained by the suspension polymerization method through one-step reaction, using monomer, dispersant, initiator, emulsifier, pore-forming agent and electrolyte as raw materials. The gas chromatography filler obtained has uniform size and good dispersibility, is easy to separate by screening, has good repeatability, and can effectively improve the separation effect. Moreover, the preparation method is simple in process, and has the advantages of wide raw material sources, low cost, mild reaction conditions, fast reaction rate, high reaction efficiency, etc., and is suitable for industrial production.

[0104] The above examples and application examples are only exemplary descriptions of the present disclosure, and do not limit the scope of the present disclosure. Without departing from the design spirit of the present disclosure, various modifications and improvements to the technical solutions of the present disclosure made by those skilled in the art shall fall within the scope of protection of the present disclosure.

Claims

1. A method for the preparation of a gas chromatography packing material, characterized in that, The method comprises the following steps: S1. adding a dispersing agent and a reaction solvent into a reaction container, and stirring until the dispersing agent is dissolved; S2. adding a monomer, a crosslinking agent, an initiator, an emulsifier, a pore-forming agent and an electrolyte into the system of S1, and reacting at 55-85°C for 20-28h to obtain a crude product; S3. washing and drying the crude product; S4. screening the dried crude product to obtain a gas chromatography packing material; The mass ratio of the reaction solvent, the dispersing agent, the crosslinking agent, the initiator, the emulsifier, the pore-forming agent, the electrolyte and the monomer is 14-16:1, 0.08-0.16:1, 2-3:1, 0.04-0.08:1, 0.01-0.03:1, 4-8:1, 0.03-0.08:1, respectively; The monomer is at least one selected from methyl methacrylate and ethyl methacrylate; and the crosslinking agent is any one or a combination of any two selected from N,N'-methylene bisacrylamide, divinylbenzene and ethylene glycol dimethacrylate; In step S4, the dried crude product is screened with a 80-mesh, 100-mesh, 120-mesh or 150-mesh stainless steel screen.

2. The method of claim 1, wherein the gas chromatography packing is prepared by the steps of: The reaction in step S2 is carried out at 70°C for 24h; The mass ratio of the reaction solvent, the dispersing agent, the crosslinking agent, the initiator, the emulsifier, the pore-forming agent, the electrolyte and the monomer is 15:1, 0.12:1, 2:1, 0.06:1, 0.02:1, 6:1, 0.05:1, respectively; The pore-forming agent is any one or a combination of any two selected from cyclohexane, dibutyl phthalate, n-heptane and cyclohexanol.

3. The method of claim 2, wherein the gas chromatography packing is prepared by the steps of: The monomer is the ethyl methacrylate; The crosslinking agent is the N,N'-methylene bisacrylamide and the ethylene glycol dimethacrylate at a mass ratio of 1:1; The pore-forming agent is the cyclohexane and the dibutyl phthalate at a mass ratio of 1:

1.

4. The method of claim 1, wherein the gas chromatography packing is prepared by the steps of: The reaction solvent is deionized water.

5. The method of claim 1, wherein the gas chromatography packing is prepared by the steps of: The dispersing agent is any one or a combination of any two selected from polyethylene glycol, carboxymethyl cellulose and sodium carboxymethyl cellulose.

6. The method of claim 1, wherein the gas chromatography packing is prepared by the steps of: The initiator is any one or a combination of any two selected from dodecanoyl peroxide, dicumyl peroxide and azobisisobutyronitrile.

7. The method for preparing gas chromatography packing material according to claim 1, characterized in that, The emulsifier is at least one selected from sodium dodecyl sulfonate and sodium dodecylbenzenesulfonate.

8. The method of claim 1, wherein the gas chromatography packing is prepared by the steps of: The electrolyte is any one or a combination of any two selected from sodium chloride, sodium polystyrene sulfonate, sodium polyacrylate and potassium carbonate.

9. A gas chromatography packing material characterized in that, The gas chromatography packing material is prepared according to the preparation method in any one of claims 1-8.

10. The gas chromatography packing of claim 9, wherein, The particle size of the gas chromatography packing material is 100-180μm, the pore size is 30-50nm, and the crosslinking degree is 30%.

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