Method for calculating concentration of volatile organic compounds in water

Abstract

The invention provides a method for calculating the concentration of volatile organic compounds in water. The method comprises the following steps: S1, obtaining an influence factor set of the volatile organic compounds in the water; the influence factor set comprises a physical influence factor, a chemical influence factor and a microbial influence factor; s2, calculating a correlation coefficient between each influence factor in the influence factor set and the concentration of the volatile organic compound, and calculating a correlation coefficient between the influence factors; s3, on the basis of the step S2, determining at least n influence factors in the physical influence factors, the chemical influence factors and the microorganism influence factors as interference factors; s4, determining a correction factor corresponding to the interference factor; s5, determining a correction coefficient according to the correction factor; s6, correcting the concentration of the volatile organic compound according to the correction coefficient to obtain the corrected concentration of the volatile organic compound; by means of the method, the more accurate concentration of the volatile organic compounds can be obtained.

Description

Technical Field

[0001] The invention relates to a monitoring field, and in particular to a method for calculating the concentration of volatile organic matter in water quality. Background Art

[0002] Volatile organic compounds (VOCs) usually refer to chemical substances with a boiling point of no more than 250°C. Their main components are compounds such as aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, aldehydes and ketones. When people ingest water containing VOCs, it will damage the liver, kidneys, immune system and nervous system, etc. It may also cause deformities, mutations and cancer. Therefore, it is particularly important to strengthen the monitoring of the concentration of volatile organic compounds in water quality.

[0003] Currently, purge and trap / gas chromatography-mass spectrometry is often used to detect the concentration of volatile organic compounds in water quality. The effect of temperature on the concentration of volatile organic compounds is usually considered during the detection process. However, the concentration of volatile organic compounds in water quality is not only affected by temperature, but also by other environmental factors. The existing technology does not comprehensively consider the influencing factors.

[0004] Therefore, in order to solve the above technical problems, it is urgent to propose a new technical means. Summary of the invention

[0005] In view of this, in order to comprehensively consider the influence of various environmental factors on the concentration of volatile organic compounds in water quality, the present invention proposes a method for calculating the concentration of volatile organic compounds in water quality.

[0006] The present invention provides a method for calculating the concentration of volatile organic compounds in water, comprising the following steps:

[0007] S1. Obtain the influencing factor set of volatile organic compounds in water quality;

[0008] The influencing factor set includes physical influencing factors, chemical influencing factors and microbial influencing factors;

[0009] S2. Calculate the correlation coefficients between the physical influencing factors, chemical influencing factors and microbial influencing factors and the concentration of volatile organic compounds, and calculate the correlation coefficients between the physical influencing factors, chemical influencing factors and microbial influencing factors;

[0010] S3. Based on step S2, at least n influencing factors among the physical influencing factors, chemical influencing factors and microbial influencing factors are determined as interference factors;

[0011] S4. Determine the correction factor corresponding to the interference factor;

[0012] S5. Determine the correction coefficient β according to the correction factor;

[0013] S6. Correction coefficient β for the concentration of volatile organic matter C x The correction is made to obtain the corrected volatile organic compound concentration, and the calculation formula is as follows:

[0014] C x ′=β·C x +H

[0015] Among them, C x ' represents the corrected volatile organic compound concentration, and H represents the dynamic correction coefficient.

[0016] Further, in step S3, at least n interference factors are determined by the following steps:

[0017] S31. Screen out the physical influencing factors, chemical influencing factors and microbial influencing factors that have significant correlation with the concentration of volatile organic compounds based on the correlation coefficient;

[0018] S32. Based on step S31, the physical influencing factors are sorted from large to small according to the absolute value of the correlation coefficient, and the physical influencing factor with the largest absolute value of the correlation coefficient is selected as the interference factor G. x1 ;

[0019] S33. Determine whether there is any significant correlation between the chemical influencing factors and the concentration of volatile organic compounds and the interference factor G. x1 If there is any chemical influencing factor with no significant correlation, the one with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor G x1 Chemical factors with no significant correlation are used as interference factors G x2 , and proceed to step S34; if not, proceed to step S35;

[0020] S34. Determine whether there is any significant correlation between the microbial influencing factors and the concentration of volatile organic compounds and the interference factor G. x1 and interference factor G x2 If there is any microbial influencing factor with no significant correlation, the factor with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor G x1 and interference factor G x2 Microbial influencing factors with no significant correlation are used as interference factors G x3 , and output the interference factor G x1 , interference factor G x2 and interference factor G x3 ; If not, proceed to step S36;

[0021] S35. Determine whether there is any significant correlation between the microbial influencing factors and the concentration of volatile organic compounds and the interference factor G. x1If there is any microbial influencing factor with no significant correlation, the factor with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor G x1 Microbial influencing factors with no significant correlation were used as interference factors G x2 , and proceed to step S36, if not, proceed to step S37;

[0022] S36. Among the physical factors that are significantly correlated with the concentration of volatile organic compounds, the physical factors that meet conditions I to III are taken as interference factors G. x3 , and output the interference factor G x1 , interference factor G x2 and interference factor G x3 ; If there is no physical influencing factor that meets conditions Ⅰ-Ⅲ, the interference factor G is directly output x1 and interference factor G x2 ;

[0023] Condition I: Physical influence factors and interference factors G x2 The correlation is not significant;

[0024] Condition II: The absolute value of the correlation coefficient between the physical influencing factor and the concentration of volatile organic compounds is less than the interference factor G x1 The absolute value of the correlation coefficient with the concentration of volatile organic compounds;

[0025] Condition III: The absolute value of the correlation coefficient between the physical influencing factor and the concentration of volatile organic compounds is greater than the absolute value of the correlation coefficient between the other physical influencing factors and the concentration of volatile organic compounds;

[0026] S37. Select the correlation coefficient whose absolute value is second only to the interference factor G x1 The physical influence factor of G is used as a new interference factor x1 ', and returns to step S33 until the interference factor G is determined x2 and interference factor G x3 ;

[0027] If there is no physical influencing factor based on steps S33-S36, the interference factor G x2 and interference factor G x3 , then among the chemical factors and microbial factors significantly related to the concentration of volatile organic compounds, select one factor that is related to the interference factor G x1 The influencing factor with the smallest correlation is taken as the interference factor G x2 and interference factor G x3 .

[0028] Further, the steps of determining the correction factor corresponding to the interference factor are as follows:

[0029] The corresponding volatile organic compound concentration under different degrees of interference factors is obtained, and the volatile organic compound concentration is used as the y value and the interference factors of different degrees are used as the x value. The interference factor and the corresponding volatile organic compound concentration are linearly fitted to obtain a fitting curve, and the proportional coefficient of the curve is used as a correction factor.

[0030] Further, the method for determining the correction coefficient β according to the correction factor is as follows:

[0031] β=ω 1 F 1 +ω 2 F 2 +…+ω n F n

[0032] ω 1 +ω 2 +…+ω n =1

[0033] Among them, F 1 、F 2 and F n denote the first, second and nth correction factors respectively, ω 1 ,ω 2 and ω n Represents weight.

[0034] Furthermore, the physical influencing factors include at least water temperature, turbidity and conductivity.

[0035] Furthermore, the chemical influencing factors include at least pH value, dissolved oxygen, ammonia nitrogen concentration, total phosphorus concentration, total nitrogen concentration, nitrate concentration and nitrite concentration.

[0036] Furthermore, the microbial influencing factors at least include the biomass of phytoplankton, the biomass of zooplankton and the biomass of bacteria.

[0037] Beneficial effects of the present invention: The present invention can improve the accuracy of volatile organic compound concentration detection by comprehensively considering the influence of physical influencing factors, chemical influencing factors and microbial influencing factors on the concentration of volatile organic compounds in water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0039] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings:

[0041] The present invention provides a method for calculating the concentration of volatile organic compounds in water, comprising the following steps:

[0042] S1. Obtain the influencing factor set of volatile organic compounds in water quality;

[0043] The influencing factor set includes physical influencing factors, chemical influencing factors and microbial influencing factors;

[0044] S2. Calculate the correlation coefficients between the physical influencing factors, chemical influencing factors and microbial influencing factors and the concentration of volatile organic compounds, and calculate the correlation coefficients between the physical influencing factors, chemical influencing factors and microbial influencing factors;

[0045] S3. Based on step S2, at least n influencing factors among the physical influencing factors, chemical influencing factors and microbial influencing factors are determined as interference factors;

[0046] S4. Determine the correction factor corresponding to the interference factor;

[0047] S5. Determine the correction coefficient β according to the correction factor;

[0048] S6. Correction coefficient β for the concentration of volatile organic matter C x The correction is made to obtain the corrected volatile organic compound concentration, and the calculation formula is as follows:

[0049] C x ′=β·C x +H

[0050] Among them, C x ' represents the corrected volatile organic concentration, and H represents the dynamic correction coefficient. Through the above method, the detection result of the volatile organic concentration in water quality can be improved.

[0051] In this embodiment, in step S1, a set of influencing factors of volatile organic compounds in water quality is obtained;

[0052] The influencing factor set includes physical influencing factors, chemical influencing factors and microbial influencing factors;

[0053] The physical influencing factors include at least water temperature, turbidity and conductivity, and may also include water pressure.

[0054] Temperature has a significant effect on the concentration of volatile organic compounds. Higher water temperature can increase the vapor pressure of organic matter, thereby increasing its volatility, leading to changes in the concentration of VOCs in water; reducing turbidity can significantly reduce the concentration of volatile organic compounds in water; high conductivity indicates that the water contains more ions, which may affect the distribution and migration of VOCs, thereby affecting the concentration of volatile organic compounds; changes in water pressure can affect the content of dissolved oxygen, which in turn indirectly affects the concentration of VOCs.

[0055] The chemical influencing factors include at least pH value, dissolved oxygen, ammonia nitrogen concentration, total phosphorus concentration, total nitrogen concentration, nitrate concentration and nitrite concentration, and may also include permanganate concentration;

[0056] The pH value directly affects the growth and activity of microorganisms, and thus affects the ability of microorganisms to degrade VOCs; dissolved oxygen may react with some volatile organic compounds in the water, causing some volatile organic compounds to be oxidized and decomposed, thereby reducing the concentration of volatile organic compounds; ammonia nitrogen is one of the main pollutants of eutrophication of water bodies. It can be converted into nitrate nitrogen under aerobic conditions and may be reduced to nitrite in an anaerobic environment. Excessive ammonia nitrogen concentration will cause hypoxia in the water body, thereby reducing the dissolved oxygen content and affecting the concentration of some volatile organic compounds.

[0057] The microbial influencing factors at least include the biomass of phytoplankton, the biomass of zooplankton and the biomass of bacteria.

[0058] Phytoplankton indirectly affects the concentration of volatile organic compounds by absorbing nutrients and affecting the chemical gradient in the surrounding environment; the feeding and excretion activities of zooplankton not only affect the number of phytoplankton, but also contribute to the vertical flux of carbon through their excrement, thereby indirectly affecting the distribution of volatile organic compounds; bacteria can reduce the concentration of organic pollutants in water by degrading them. For example, some bacteria are able to secrete decomposing enzymes that break down organic and hydrocarbon materials into simpler compounds, thereby reducing the concentration of organic matter in water.

[0059] The above-mentioned influencing factors directly or indirectly affect the concentration of some volatile organic compounds, providing a basis for subsequent corrections.

[0060] In this embodiment, in step S2, the correlation coefficients between the physical influencing factors, the chemical influencing factors, the microbial influencing factors and the concentration of volatile organic compounds are calculated, and the correlation coefficients between the physical influencing factors, the chemical influencing factors and the microbial influencing factors are calculated;

[0061] That is, calculate the correlation coefficients between different physical influencing factors, such as water temperature, turbidity and conductivity, and the concentration of volatile organic compounds; calculate the correlation coefficients between different chemical influencing factors, such as pH value, dissolved oxygen, ammonia nitrogen concentration, total phosphorus concentration, total nitrogen concentration, nitrate concentration and nitrite concentration, and the concentration of volatile organic compounds; calculate the correlation coefficients between different microbial influencing factors, such as the biomass of phytoplankton, the biomass of zooplankton and the biomass of bacteria, and the concentration of volatile organic compounds;

[0062] As well as the correlation coefficients between the physical influencing factors and the chemical influencing factors, the physical influencing factors and the microbial influencing factors, and the microbial influencing factors and the chemical influencing factors, the correlation coefficients adopt the existing Pearson correlation coefficients, and the specific calculation process will not be elaborated here.

[0063] Through the above method, the correlation between different influencing factors and volatile organic compound concentrations can be intuitively compared, providing a basis for the subsequent determination of interference factors.

[0064] In this embodiment, in step S3, at least n influencing factors among the physical influencing factors, chemical influencing factors and microbial influencing factors are determined as interference factors;

[0065] Determine at least n interference factors by the following steps:

[0066] S31. Screen out the physical influencing factors, chemical influencing factors and microbial influencing factors that have significant correlation with the concentration of volatile organic compounds based on the correlation coefficient;

[0067] S32. Based on step S31, the physical influencing factors are sorted from large to small according to the absolute value of the correlation coefficient, and the physical influencing factor with the largest absolute value of the correlation coefficient is selected as the interference factor G. x1 ;

[0068] S33. Determine whether there is any significant correlation between the chemical influencing factors and the concentration of volatile organic compounds and the interference factor G. x1 If there is any chemical influencing factor with no significant correlation, the one with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor G x1 Chemical factors with no significant correlation are used as interference factors G x2 , and proceed to step S34; if not, proceed to step S35;

[0069] S34. Determine whether there is any significant correlation between the microbial influencing factors and the concentration of volatile organic compounds and the interference factor G. x1 and interference factor G x2 If there is any microbial influencing factor with no significant correlation, the factor with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor Gx1 and interference factor G x2 Microbial influencing factors with no significant correlation are used as interference factors G x3 , and output the interference factor G x1 , interference factor G x2 and interference factor G x3 ; If not, proceed to step S36;

[0070] S35. Determine whether there is any significant correlation between the microbial influencing factors and the concentration of volatile organic compounds and the interference factor G. x1 If there is any microbial influencing factor with no significant correlation, the factor with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor G x1 Microbial influencing factors with no significant correlation were used as interference factors G x2 , and proceed to step S36, if not, proceed to step S37;

[0071] S36. Among the physical factors that are significantly correlated with the concentration of volatile organic compounds, the physical factors that meet conditions I to III are taken as interference factors G. x3 , and output the interference factor G x1 , interference factor G x2 and interference factor G x3 ; If there is no physical influencing factor that meets conditions Ⅰ-Ⅲ, the interference factor G is directly output x1 and interference factor G x2 ;

[0072] Condition I: Physical influence factors and interference factors G x2 The correlation is not significant;

[0073] Condition II: The absolute value of the correlation coefficient between the physical influencing factor and the concentration of volatile organic compounds is less than the interference factor G x1 The absolute value of the correlation coefficient with the concentration of volatile organic compounds;

[0074] Condition III: The absolute value of the correlation coefficient between the physical influencing factor and the concentration of volatile organic compounds is greater than the absolute value of the correlation coefficient between the other physical influencing factors and the concentration of volatile organic compounds;

[0075] S37. Select the correlation coefficient whose absolute value is second only to the interference factor G x1 The physical influence factor of G is used as a new interference factor x1 ', and returns to step S33 until the interference factor G is determined x2 and interference factor G x3 ;

[0076] That is, when the physical influencing factor with the largest absolute value of the correlation coefficient cannot determine the interference factor G x2 and interference factor Gx3 When the absolute value of the correlation coefficient is the second largest, the physical influencing factor is selected as the new interference factor G x1 ', and return to step S33, if the interference factor G can be determined in step S34 or step S36 x2 , or the interference factor G x2 and interference factor G x3 , then directly output the corresponding interference factor, and terminate the step of determining the interference factor;

[0077] If there is no physical influencing factor based on steps S33-S36, the interference factor G x2 and interference factor G x3 , then among the chemical factors and microbial factors significantly related to the concentration of volatile organic compounds, select one factor that is related to the interference factor G x1 The influencing factor with the smallest correlation is taken as the interference factor G x2 and interference factor G x3 .

[0078] If chemical influencing factors or microbial influencing factors with significant correlation with physical influencing factors are selected, the selected interference factors may affect volatile organic compounds at the same level, such as water pressure and dissolved oxygen. Although pressure has a greater impact on the concentration of volatile organic compounds in the air, the impact on the concentration of volatile organic compounds in water quality is indirectly achieved through dissolved oxygen. The impact of water pressure and dissolved oxygen is actually at the same level. If water pressure and dissolved oxygen are selected as interference factors, the correction factors determined by the two interference factors may be similar. The interference factors determined by the above method can ensure to the greatest extent possible that the interference factors have different levels of influence on the concentration of volatile organic compounds, thereby determining more comprehensive interference factors.

[0079] In this embodiment, in step S4, a correction factor corresponding to the interference factor is determined;

[0080] The steps of determining the correction factor corresponding to the interference factor are as follows:

[0081] Obtaining the corresponding volatile organic compound concentration under different degrees of interference factors, this process can be obtained through experiments; taking the volatile organic compound concentration as the y value and the interference factors of different degrees as the x value, performing linear fitting on the interference factors and the corresponding volatile organic compound concentration to obtain a fitting curve, and taking the proportional coefficient of the curve as a correction factor;

[0082] Taking water temperature as an example, the corresponding volatile organic compound concentrations at different temperatures are obtained, and the corresponding volatile organic compound concentrations at different temperatures are linearly fitted to obtain the proportional coefficient as the correction factor of the water temperature. Through the above method, the relationship between the interference factor and the volatile organic compound concentration can be quickly and simply determined.

[0083] In this embodiment, in step S5, a correction coefficient β is determined according to the correction factor;

[0084] The method for determining the correction coefficient β according to the correction factor is as follows:

[0085] β=ω 1 F 1 +ω 2 F 2 +…+ω n F n

[0086] ω 1 +ω 2 +…+ω n =1

[0087] Among them, F 1 、F 2 and F n denote the first, second and nth correction factors respectively, ω 1 ,ω 2 and ω n Represents the weight, which is set based on experience. Through the above method, the influence of the overall environmental impact factors on the concentration of volatile organic compounds can be determined more comprehensively and accurately.

[0088] In this embodiment, in step S6, the concentration C of the volatile organic compound is adjusted according to the correction coefficient β. x The correction is made to obtain the corrected volatile organic compound concentration, and the calculation formula is as follows:

[0089] C x ′=β·C x +H

[0090] Among them, C x ' represents the corrected volatile organic compound concentration, H represents the dynamic correction coefficient, and H can be set based on experience.

[0091] Through the above method, the influence of the overall environmental factors of water quality on the concentration of volatile organic compounds can be comprehensively considered, thereby improving the accuracy of the calculation of the concentration of volatile organic compounds.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for calculating the concentration of volatile organic compounds in water, characterized in that: The following steps are involved: S1. Obtain the influencing factor set of volatile organic compounds in water quality; The influencing factor set includes physical influencing factors, chemical influencing factors and microbial influencing factors; S2. Calculate the correlation coefficients between the physical influencing factors, chemical influencing factors and microbial influencing factors and the concentration of volatile organic compounds, and calculate the correlation coefficients between the physical influencing factors, chemical influencing factors and microbial influencing factors; S3. Based on step S2, at least n influencing factors among the physical influencing factors, chemical influencing factors and microbial influencing factors are determined as interference factors; S4. Determine the correction factor corresponding to the interference factor; S5. Determine the correction coefficient β according to the correction factor; S6. Correction coefficient β for the concentration of volatile organic matter C x The correction is made to obtain the corrected volatile organic compound concentration, and the calculation formula is as follows: C x ′=β·C x +H Among them, C x ' represents the corrected volatile organic compound concentration, and H represents the dynamic correction coefficient.

2. The method for calculating the concentration of volatile organic compounds in water according to claim 1, characterized in that: In step S3, at least n interference factors are determined by the following steps: S31. Screen out the physical influencing factors, chemical influencing factors and microbial influencing factors that have significant correlation with the concentration of volatile organic compounds based on the correlation coefficient; S32. Based on step S31, the physical influencing factors are sorted from large to small according to the absolute value of the correlation coefficient, and the physical influencing factor with the largest absolute value of the correlation coefficient is selected as the interference factor C. x1 ; S33. Determine whether there is any significant correlation between the chemical influencing factors and the concentration of volatile organic compounds and the interference factor G. x1 If there is any chemical influencing factor with no significant correlation, the one with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor G x1 Chemical factors with no significant correlation are used as interference factors G x2 , and proceed to step S34; if not, proceed to step S35; S34. Determine whether there is any significant correlation between the microbial influencing factors and the concentration of volatile organic compounds and the interference factor G. x1 and interference factor G x2 If there is any microbial influencing factor with no significant correlation, the factor with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor G x1 and interference factor G x2 Microbial influencing factors with no significant correlation are used as interference factors G x3 , and output the interference factor G x1 , interference factor G x2 and interference factor G x3 ; If not, proceed to step S36; S35. Determine whether there is any significant correlation between the microbial influencing factors and the concentration of volatile organic compounds and the interference factor G. x1 If there is any microbial influencing factor with no significant correlation, the factor with the largest absolute value of correlation coefficient with volatile organic compound concentration and with the interference factor G x1 Microbial influencing factors with no significant correlation were used as interference factors G x2 , and proceed to step S36, if not, proceed to step S37; S36. Among the physical factors that are significantly correlated with the concentration of volatile organic compounds, the physical factors that meet conditions I to III are taken as interference factors G. x3 , and output the interference factor G x1 , interference factor G x2 and interference factor G x3 ; If there is no physical influencing factor that meets conditions Ⅰ-Ⅲ, the interference factor G is directly output x1 and interference factor G x2 ; Condition I: Physical influence factors and interference factors G x2 The correlation is not significant; Condition II: The absolute value of the correlation coefficient between the physical influencing factor and the concentration of volatile organic compounds is less than the interference factor G x1 The absolute value of the correlation coefficient with the concentration of volatile organic compounds; Condition III: The absolute value of the correlation coefficient between the physical influencing factor and the concentration of volatile organic compounds is greater than the absolute value of the correlation coefficient between the other physical influencing factors and the concentration of volatile organic compounds; S37. Select the correlation coefficient whose absolute value is second only to the interference factor G x1 The physical influence factor of G is used as a new interference factor x1 ', and returns to step S33 until the interference factor G is determined x2 and interference factor G x3 ; If there is no physical influencing factor based on steps S33-S36, the interference factor G x2 and interference factor G x3 , then among the chemical factors and microbial factors significantly related to the concentration of volatile organic compounds, select one factor that is related to the interference factor G x1 The influencing factor with the smallest correlation is taken as the interference factor G x2 and interference factor G x3 .

3. The method for calculating the concentration of volatile organic compounds in water according to claim 2, characterized in that: The steps of determining the correction factor corresponding to the interference factor are as follows: The corresponding volatile organic compound concentration under different degrees of interference factors is obtained, and the volatile organic compound concentration is used as the y value and the interference factors of different degrees are used as the x value. The interference factor and the corresponding volatile organic compound concentration are linearly fitted to obtain a fitting curve, and the proportional coefficient of the curve is used as a correction factor.

4. The method for calculating the concentration of volatile organic compounds in water according to claim 3, characterized in that: The method for determining the correction coefficient β according to the correction factor is as follows: β=ω1F1+ω2F2+…+ω n F n ω1+ω2+…+ω n =1 Among them, F1, F2 and F n denote the first, second and nth correction factors, ω1, ω2 and ω n Represents weight.

5. The method for calculating the concentration of volatile organic compounds in water according to any one of claim 1 or claim 2, characterized in that: The physical influencing factors include at least water temperature, turbidity and conductivity.

6. The method for calculating the concentration of volatile organic compounds in water according to any one of claim 1 or claim 2, characterized in that: The chemical influencing factors at least include pH value, dissolved oxygen, ammonia nitrogen concentration, total phosphorus concentration, total nitrogen concentration, nitrate concentration and nitrite concentration.

7. The method for calculating the concentration of volatile organic compounds in water according to any one of claim 1 or claim 2, characterized in that: The microbial influencing factors at least include the biomass of phytoplankton, the biomass of zooplankton and the biomass of bacteria.

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