A soil pollutant analysis and detection system and method

Abstract

The present invention provides a soil pollutant analysis and detection system and method, the system includes a gas chromatography-mass spectrometry terminal, a data processing terminal, a maintenance terminal and a display terminal; the gas chromatography-mass spectrometry terminal is used to detect sulfur compounds in soil samples and generate sample detection information; the sample detection information includes mass spectrum information and total ion current chromatogram information; the data processing terminal is used to perform corresponding mass spectrum extraction operations on all chromatographic peaks according to the total mass spectrum information and the total ion current chromatogram information analysis, and generate extracted mass spectrum information corresponding to the chromatographic peaks; the display terminal is used to display the total mass spectrum information, the total ion current chromatogram information and all extracted mass spectrum information; the maintenance terminal is used to record the maintenance time and usage of the gas chromatography-mass spectrometry terminal, and generate maintenance prompt information according to the maintenance time and usage. The present invention has the effect of improving the accuracy and stability of the analysis and detection system.

Description

Technical Field

[0001] The present invention relates to the technical field of pollutant detection, and in particular to a soil pollutant analysis and detection system and method. Background Art

[0002] Soil pollutants refer to substances that pollute the soil. They come from a wide range of sources, including industrial and urban wastewater and solid waste, pesticides and fertilizers, livestock excrement, biological residues, and atmospheric precipitation. In addition, around certain mineral deposits or high concentration centers of elements and compounds in nature, natural diffusion zones are often formed due to the natural decomposition and weathering of minerals, causing the content of certain elements in the nearby soil to exceed the content of general soil. It can be divided into chemical pollution, physical pollution, biological pollution, and radioactive pollution.

[0003] Now, many soil pollutant analysis and detection systems have been developed. After extensive searching and reference, we found that the existing analysis and detection systems include those disclosed in publication numbers CN112903858A, CN109839395B, EP3225988A1, US06405135B1, and JP2007528284A. These analysis and detection systems generally include: a sample collector, a gas mixing chamber, a gas phase mass spectrometry detection system, a computer, a nitrogen bottle, and a soil sampling tube; the soil sampling tube is a long tube that is inserted into the soil to extract different depths of Soil sample; the bottom opening of the sample collector is used to insert into the soil sampling tube to collect soil samples; one side of the bottom of the sample collector is connected to a nitrogen bottle, and nitrogen is introduced into the sample collector through the nitrogen bottle; the gas mixing chamber is located at the top of the sample collector, and is used to mix the gaseous organic matter in the soil sample with the introduced nitrogen; the top of the gas mixing chamber is connected to the gas phase mass spectrometry detection system through a connecting tube, and the concentration of the gaseous organic matter in the gas mixing chamber is detected by the gas phase mass spectrometry detection system; the computer is connected to the gas phase mass spectrometry detection system signal, and is used to calculate and display the concentration distribution of organic pollutants in soil samples at different depths. Since the detection data of the gas phase mass spectrometry detection system requires manual operation to extract the mass spectrum of the corresponding chromatographic peak, the accuracy of the extraction process is unstable, and the system also needs timely maintenance, otherwise it is easy to cause the system detection quality to be unstable, resulting in the defects of low accuracy and stability of the analysis and detection system. Summary of the invention

[0004] The purpose of the present invention is to provide a soil pollutant analysis and detection system and method in view of the shortcomings of the above-mentioned analysis and detection system.

[0005] The present invention adopts the following technical solution:

[0006] A soil pollutant analysis and detection system comprises a gas chromatography-mass spectrometry terminal, a data processing terminal, a maintenance terminal and a display terminal; the gas chromatography-mass spectrometry terminal is used to detect sulfur-containing compounds in soil samples and generate sample detection information; the sample detection information comprises mass spectrum information and total ion current chromatogram information; the data processing terminal is used to perform corresponding mass spectrum extraction operations on all chromatographic peaks according to the total mass spectrum information and the total ion current chromatogram information analysis, and generate extracted mass spectrum information corresponding to the chromatographic peaks; the display terminal is used to display the total mass spectrum information, the total ion current chromatogram information and all extracted mass spectrum information; the maintenance terminal is used to record the maintenance time and usage of the gas chromatography-mass spectrometry terminal, and generate maintenance prompt information according to the maintenance time and usage; the maintenance prompt information is used to be displayed in the display terminal.

[0007] Optionally, the data processing terminal includes an extraction sequence calculation module, an extraction extension range calculation module, an extraction module, a spectral library retrieval module and a saving module; the extraction sequence calculation module is used to calculate the sequence of corresponding mass spectrum extraction operations of each chromatographic peak according to the total ion current chromatogram information, and generate extraction sequence information; the extraction extension range calculation module calculates the peak-valley horizontal coordinate extension variables of the corresponding mass spectrum extraction operation of each chromatographic peak according to the total ion current chromatogram information, and generates extension range information; the extraction module is used to perform corresponding mass spectrum extraction operations on the chromatographic peaks in sequence according to the extraction sequence information and the extension range information; the spectral library retrieval module is used to perform spectral library retrieval on the mass spectra corresponding to each chromatographic peak, and generate retrieval information; the retaining module is used to save the extracted corresponding mass spectra of each chromatographic peak and the corresponding retrieval information as extracted mass spectrum information.

[0008] Optionally, the extraction order calculation module includes an extraction weight value calculation submodule and an extraction order confirmation submodule, wherein the extraction weight value calculation submodule is used to calculate the extraction weight value of each chromatographic peak according to the total ion current chromatogram information; the extraction order confirmation submodule is used to confirm the corresponding mass spectrum extraction order of each chromatographic peak according to the extraction weight value;

[0009] When the weight value extraction calculation submodule performs calculation, the following formula is satisfied:

[0010]

[0011] Among them, Q i Indicates the extraction weight value of the i-th chromatographic peak in the total ion current chromatogram information; C i represents the relative abundance value of the i-th chromatographic peak in the total ion current chromatogram information; I represents the total number of chromatographic peaks in the total ion current chromatogram information; K1 represents the abundance weight conversion coefficient, which is set by the experimenter according to the actual situation; q represents the weight value base, which is set by the experimenter according to experience; H iIndicates the width of the i-th chromatographic peak in the total ion current chromatogram information; K2 represents the width weight conversion coefficient, which is set by the experimenter according to the actual situation;

[0012] The extraction order confirmation submodule is used to i All chromatographic peaks were sorted to confirm the order of mass spectrum extraction of each chromatographic peak.

[0013] Optionally, the extraction extension range calculation module includes an extraction extension variable calculation submodule and an extension range proofreading submodule; the extraction extension variable calculation submodule is used to calculate the extension variables of the peak-valley horizontal coordinates of the corresponding mass spectrum extraction operation of each chromatographic peak according to the total ion current chromatogram information; the extension range proofreading submodule is used to proofread the extension range and generate corresponding extension range information;

[0014] When the extraction and extension variable calculation submodule calculates, the following formula is satisfied:

[0015]

[0016] d1=a i -b i-1

[0017] d2=a i+1 -b i

[0018] Where Δh i Indicates the chromatographic peak valley horizontal coordinate expansion variable extracted from the corresponding mass spectrum of the i-th chromatographic peak in the total ion current chromatogram information; d1 indicates the distance between the i-th chromatographic peak and the i-1-th chromatographic peak; d2 indicates the distance between the i-th chromatographic peak and the i+1-th chromatographic peak; H i-1 Indicates the width of the i-1th chromatographic peak in the total ion current chromatogram information; H i+1 Indicates the width of the i+1th chromatographic peak in the total ion current chromatogram information; h ref Indicates the expansion base, which is set by the experimenter according to the actual situation; a i Indicates the horizontal coordinate value of the valley of the i-th chromatographic peak close to the i-1-th chromatographic peak; a i+1 Indicates the horizontal coordinate value of the valley of the i+1th chromatographic peak close to the i-th chromatographic peak; b i-1 b represents the horizontal coordinate value of the valley of the i-1th chromatographic peak close to the i-th chromatographic peak; i Indicates the horizontal coordinate value of the valley of the i-th chromatographic peak close to the i+1-th chromatographic peak;

[0019] When the extended range calibration submodule is working, the following formula is satisfied:

[0020]

[0021] A i =a i -Δh i

[0022] A i ′=A i -σ

[0023]

[0024] B i =b i +Δh i

[0025] B i ′=B i +σ

[0026] Among them, OUT A Indicates the calibration function for confirming the extension boundary value of the chromatographic peak valley close to the i-1 chromatographic peak in the extension range when extracting the corresponding mass spectrum of the i-th chromatographic peak; OUT B A represents the extended boundary value of the chromatographic peak valley close to the i+1th chromatographic peak in the calibrated extended range when extracting the corresponding mass spectrum of the i-th chromatographic peak; i A represents the first extended boundary value of the valley of the i-th chromatographic peak close to the i-1-th chromatographic peak; i ' represents the second extended boundary value of the valley of the i-th chromatographic peak close to the i-1-th chromatographic peak; Y(A i ) represents the value of the ordinate at the first extended boundary value; Y(A i ′) represents the value of the ordinate at the second extended boundary value; σ represents the minimum scale value of the abscissa axis in the total ion current chromatogram information;

[0027] B i Indicates the third extended boundary value of the valley of the i-th chromatographic peak close to the i+1-th chromatographic peak; B i ' represents the fourth extended boundary value of the valley of the i-th chromatographic peak close to the i+1-th chromatographic peak; Y(B i ) represents the value of the ordinate at the third extended boundary value; Y(B i ′) represents the value of the ordinate at the fourth extension boundary value.

[0028] Optionally, the maintenance terminal includes a maintenance record module, a usage record module and a maintenance prompt information generation module; the maintenance record module is used to record the maintenance time of the gas chromatography-mass spectrometry terminal by the experimenter and generate maintenance time information; the usage record module is used to record the usage time and usage of the gas chromatography-mass spectrometry terminal by the experimenter and generate usage information; the maintenance prompt information generation module is used to generate maintenance prompt information according to the maintenance time information and usage information;

[0029] When the maintenance prompt information generation module is working, the maintenance index is calculated using the following formula:

[0030]

[0031]

[0032] Where W represents the maintenance index; f(E) represents the weight coefficient selection function of the previous maintenance; E represents the number of items maintained during the previous maintenance; w represents the maintenance baseline value conversion coefficient, which is set by the experimenter according to the actual situation; T represents the number of days between the current day and the previous maintenance; t j It indicates the number of experiments performed when the GC / MS terminal was used for the jth time between the current day and the last maintenance; J indicates the total number of times the GC / MS terminal was used between the current day and the last maintenance; s indicates the conversion coefficient of the reference value, which is set by the experimenter according to the actual situation;

[0033] Before generating maintenance reminder information, the maintenance reminder information generation module is judged by the following formula:

[0034]

[0035] Wherein, judge(W) represents the maintenance prompt judgment function; It represents the judgment threshold, which is set by the experimenter according to the actual situation to facilitate the adjustment of the prompt sensitivity of the maintenance prompt.

[0036] A soil pollutant analysis and detection method is applied to a soil pollutant analysis and detection system as described above, and the analysis and detection method comprises:

[0037] S1, performing sulfur compound detection on a soil sample to generate sample detection information; the sample detection information includes mass spectrum information and total ion current chromatogram information;

[0038] S2, performing corresponding mass spectrum extraction operations on all chromatographic peaks according to the total mass spectrum information and the total ion current chromatogram information analysis to generate extracted mass spectrum information corresponding to the chromatographic peaks;

[0039] S3, displays total mass spectrum information, total ion current chromatogram information and all extracted mass spectrum information;

[0040] S4, recording the maintenance time and usage of the GC / MS terminal, and generating maintenance reminder information according to the maintenance time and usage.

[0041] The beneficial effects achieved by the present invention are:

[0042] 1. The setting of GC-MS terminal, data processing terminal, maintenance terminal and display terminal is conducive to improving the speed of data processing, realizing automatic extraction of mass spectrum information, reducing manual operation errors, and thus improving the accuracy of data, making the analysis and detection system more efficient and accurate;

[0043] 2. The settings of the extraction sequence calculation module, the extraction extension range calculation module, the extraction module, the library retrieval module and the saving module are conducive to extracting mass spectrum information more smoothly and quickly according to the extraction sequence. During the extraction, the accuracy of each extraction is improved by extending the range calculation, and more efficient and accurate automatic extraction of mass spectrum information is achieved, thereby further improving the working efficiency and accuracy of the system;

[0044] 3. The settings of the extraction weight value calculation submodule and the extraction order confirmation submodule, together with the extraction weight value algorithm, are conducive to accurately and quickly confirming the extraction order of each chromatographic peak, thereby further improving the overall work efficiency and accuracy of the system;

[0045] 4. The settings of the extraction extended variable calculation submodule and the extended range proofreading submodule, in conjunction with the extraction extended variable calculation algorithm, are conducive to improving the accuracy of the extended variables, and more efficiently and accurately extracting the mass spectrum corresponding to each chromatographic peak, thereby further improving the overall work efficiency and accuracy of the system; in conjunction with the extended range proofreading algorithm, it is conducive to further improving the value of the extended variables through the relationship between adjacent chromatographic peaks, thereby improving the extraction accuracy;

[0046] 5. The settings of the maintenance record module, the usage record module and the maintenance prompt information generation module cooperate with the maintenance index algorithm to generate maintenance prompt information accurately and timely, thereby helping to keep the system in a stable working state;

[0047] 6. The setting of the column replacement reminder module, the oil pump maintenance reminder module and the face recognition module, together with the column replacement reminder algorithm and the oil pump maintenance reminder algorithm, is conducive to accurately prompting the corresponding experimenter to maintain the system, thereby improving the system's working stability and experimental accuracy.

[0048] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0050] Figure 2 A total ion current chromatogram of the total ion current chromatogram information in the present invention and a schematic diagram of the total ion current chromatogram after amplification of the chromatographic peak;

[0051] Figure 3 It is a schematic diagram of the effect of the mass spectrum extraction operation corresponding to the chromatographic peak in the present invention;

[0052] Figure 4 A schematic diagram of a method flow of a soil pollutant analysis and detection method in the present invention;

[0053] Figure 5 It is a schematic diagram of the overall structure of the maintenance terminal in the present invention;

[0054] Figure 6 The figure is a flow chart of the determination method of the face recognition module in the present invention. DETAILED DESCRIPTION

[0055] The following is an explanation of the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0056] Embodiment 1.

[0057] This embodiment provides a soil pollutant analysis and detection system. Figure 1As shown, a soil pollutant analysis and detection system includes a gas chromatography-mass spectrometry terminal, a data processing terminal, a maintenance terminal and a display terminal; the gas chromatography-mass spectrometry terminal is used to detect sulfur-containing compounds in soil samples and generate sample detection information; the sample detection information includes mass spectrum information and total ion current chromatogram information; the data processing terminal is used to perform corresponding mass spectrum extraction operations on all chromatographic peaks according to the total mass spectrum information and the total ion current chromatogram information analysis, and generate extracted mass spectrum information corresponding to the chromatographic peaks; the display terminal is used to display the total mass spectrum information, the total ion current chromatogram information and all extracted mass spectrum information; the maintenance terminal is used to record the maintenance time and usage of the gas chromatography-mass spectrometry terminal, and generate maintenance prompt information according to the maintenance time and usage; the maintenance prompt information is used to be displayed in the display terminal.

[0058] Optionally, the data processing terminal includes an extraction sequence calculation module, an extraction extension range calculation module, an extraction module, a spectral library retrieval module and a saving module; the extraction sequence calculation module is used to calculate the sequence of corresponding mass spectrum extraction operations of each chromatographic peak according to the total ion current chromatogram information, and generate extraction sequence information; the extraction extension range calculation module calculates the peak-valley horizontal coordinate extension variables of the corresponding mass spectrum extraction operation of each chromatographic peak according to the total ion current chromatogram information, and generates extension range information; the extraction module is used to perform corresponding mass spectrum extraction operations on the chromatographic peaks in sequence according to the extraction sequence information and the extension range information; the spectral library retrieval module is used to perform spectral library retrieval on the mass spectra corresponding to each chromatographic peak, and generate retrieval information; the retaining module is used to save the extracted corresponding mass spectra of each chromatographic peak and the corresponding retrieval information as extracted mass spectrum information.

[0059] It should be noted that the search information described in this embodiment includes the corresponding search information of sulfur-containing compounds, which may be but is not limited to methyl mercaptan, ethyl mercaptan, methyl sulfide, ethyl sulfide and carbon disulfide.

[0060] Optionally, the extraction order calculation module includes an extraction weight value calculation submodule and an extraction order confirmation submodule, wherein the extraction weight value calculation submodule is used to calculate the extraction weight value of each chromatographic peak according to the total ion current chromatogram information; the extraction order confirmation submodule is used to confirm the corresponding mass spectrum extraction order of each chromatographic peak according to the extraction weight value;

[0061] When the weight value extraction calculation submodule performs calculation, the following formula is satisfied:

[0062]

[0063] Among them, Q i Indicates the extraction weight value of the i-th chromatographic peak in the total ion current chromatogram information; C irepresents the relative abundance value of the i-th chromatographic peak in the total ion current chromatogram information; I represents the total number of chromatographic peaks in the total ion current chromatogram information; K1 represents the abundance weight conversion coefficient, which is set by the experimenter according to the actual situation; q represents the weight value base, which is set by the experimenter according to experience; H i Indicates the width of the i-th chromatographic peak in the total ion current chromatogram information; K2 represents the width weight conversion coefficient, which is set by the experimenter according to the actual situation;

[0064] The extraction order confirmation submodule is used to i All chromatographic peaks were sorted to confirm the order of mass spectrum extraction of each chromatographic peak.

[0065] Optional, combined Figure 2 and Figure 3 As shown, the extraction extension range calculation module includes an extraction extension variable calculation submodule and an extension range proofreading submodule; the extraction extension variable calculation submodule is used to calculate the extension variables of the peak-valley horizontal coordinates of the corresponding mass spectrum extraction operation of each chromatographic peak according to the total ion current chromatogram information; the extension range proofreading submodule is used to proofread the extension range and generate corresponding extension range information;

[0066] When the extraction and extension variable calculation submodule calculates, the following formula is satisfied:

[0067]

[0068] d1=a i -b i-1

[0069] d2=a i+1 -b i

[0070] Where Δh i Indicates the chromatographic peak valley horizontal coordinate expansion variable extracted from the corresponding mass spectrum of the i-th chromatographic peak in the total ion current chromatogram information; d1 indicates the distance between the i-th chromatographic peak and the i-1-th chromatographic peak; d2 indicates the distance between the i-th chromatographic peak and the i+1-th chromatographic peak; H i-1 Indicates the width of the i-1th chromatographic peak in the total ion current chromatogram information; H i+1 Indicates the width of the i+1th chromatographic peak in the total ion current chromatogram information; h ref Indicates the expansion base, which is set by the experimenter according to the actual situation; a i Indicates the horizontal coordinate value of the valley of the i-th chromatographic peak close to the i-1-th chromatographic peak; a i+1 Indicates the horizontal coordinate value of the valley of the i+1th chromatographic peak close to the i-th chromatographic peak; b i-1b represents the horizontal coordinate value of the valley of the i-1th chromatographic peak close to the i-th chromatographic peak; i Indicates the horizontal coordinate value of the valley of the i-th chromatographic peak close to the i+1-th chromatographic peak;

[0071] When the extended range calibration submodule is working, the following formula is satisfied:

[0072]

[0073] A i =a i -Δh i

[0074] A i ′=A i -σ

[0075]

[0076] B i =b i +Δh i

[0077] B i ′=B i +σ

[0078] Among them, OUT A Indicates the calibration function for confirming the extension boundary value of the chromatographic peak valley close to the i-1 chromatographic peak in the extension range when extracting the corresponding mass spectrum of the i-th chromatographic peak; OUT B A represents the extended boundary value of the chromatographic peak valley close to the i+1th chromatographic peak in the calibrated extended range when extracting the corresponding mass spectrum of the i-th chromatographic peak; i A represents the first extended boundary value of the valley of the i-th chromatographic peak close to the i-1-th chromatographic peak; i ' represents the second extended boundary value of the valley of the i-th chromatographic peak close to the i-1-th chromatographic peak; Y(A i ) represents the value of the ordinate at the first extended boundary value; Y(A i ′) represents the value of the ordinate at the second extended boundary value; σ represents the minimum scale value of the abscissa axis in the total ion current chromatogram information;

[0079] B i Indicates the third extended boundary value of the valley of the i-th chromatographic peak close to the i+1-th chromatographic peak; B i ' represents the fourth extended boundary value of the valley of the i-th chromatographic peak close to the i+1-th chromatographic peak; Y(B i ) represents the value of the ordinate at the third extended boundary value; Y(B i ′) represents the value of the ordinate at the fourth extension boundary value.

[0080] Optionally, the maintenance terminal includes a maintenance record module, a usage record module and a maintenance prompt information generation module; the maintenance record module is used to record the maintenance time of the gas chromatography-mass spectrometry terminal by the experimenter and generate maintenance time information; the usage record module is used to record the usage time and usage of the gas chromatography-mass spectrometry terminal by the experimenter and generate usage information; the maintenance prompt information generation module is used to generate maintenance prompt information according to the maintenance time information and usage information;

[0081] When the maintenance prompt information generation module is working, the maintenance index is calculated using the following formula:

[0082]

[0083]

[0084] Where W represents the maintenance index; f(E) represents the weight coefficient selection function of the previous maintenance; E represents the number of items maintained during the previous maintenance; w represents the maintenance baseline value conversion coefficient, which is set by the experimenter according to the actual situation; T represents the number of days between the current day and the previous maintenance; t j It indicates the number of experiments performed when the GC / MS terminal was used for the jth time between the current day and the last maintenance; J indicates the total number of times the GC / MS terminal was used between the current day and the last maintenance; s indicates the conversion coefficient of the reference value, which is set by the experimenter according to the actual situation;

[0085] Before generating maintenance reminder information, the maintenance reminder information generation module is judged by the following formula:

[0086]

[0087] Wherein, judge(W) represents the maintenance prompt judgment function; It represents the judgment threshold, which is set by the experimenter according to the actual situation to facilitate the adjustment of the prompt sensitivity of the maintenance prompt.

[0088] A soil pollutant analysis and detection method, applied to a soil pollutant analysis and detection system as described above, combined with Figure 4 As shown, the analysis and detection method includes:

[0089] S1, performing sulfur compound detection on a soil sample to generate sample detection information; the sample detection information includes mass spectrum information and total ion current chromatogram information;

[0090] S2, performing corresponding mass spectrum extraction operations on all chromatographic peaks according to the total mass spectrum information and the total ion current chromatogram information analysis to generate extracted mass spectrum information corresponding to the chromatographic peaks;

[0091] S3, displays total mass spectrum information, total ion current chromatogram information and all extracted mass spectrum information;

[0092] S4, recording the maintenance time and usage of the GC / MS terminal, and generating maintenance reminder information according to the maintenance time and usage.

[0093] Embodiment 2.

[0094] This embodiment includes all the contents of the first embodiment, and provides a soil pollutant analysis and detection system. Figure 5 As shown, the maintenance terminal also includes a column replacement prompt module, an oil pump maintenance prompt module and a face recognition module. The column replacement prompt module is used to generate column replacement prompt information according to the item category and usage information of the previous maintenance; the oil pump maintenance prompt module is used to generate oil pump maintenance prompt information according to the item category and usage information of the previous maintenance; the face recognition module is used to identify the identity of the experimenter, and determine whether the current experimenter has the maintenance qualification according to the face information of a preset face database, and if so, generate a sending instruction; the sending instruction is used to drive the column replacement prompt module and the oil pump maintenance prompt module to send the column replacement prompt information and the oil pump maintenance prompt information to the display terminal.

[0095] When the column change prompt module is working, the following formula is satisfied:

[0096]

[0097]

[0098] Among them, column replacement means replacing the capillary column in the GC / MS terminal; Z represents the number of days after the last maintenance that the column of the GC / MS terminal should be replaced; B(u) represents the function for selecting the reference number of days for column replacement; t ref represents the number of reference experiments each time the GC / MS terminal is used; λ1 represents the conversion coefficient of the number of days for column replacement; t ref and λ1 are set by the experimenter in advance based on experience; b max Indicates the maximum base days for column replacement; b min Indicates the minimum base number of days for column replacement; b max and b min They are all set by the experimenter based on experience; u is a schematic value indicating whether the project category of the previous maintenance includes column replacement maintenance; u=1 means that the project category of the previous maintenance includes column replacement maintenance; u=0 means that the project category of the previous maintenance does not include column replacement maintenance.

[0099] When Z ≥ μ1, it is determined that the capillary column needs to be replaced, and the column replacement prompt module generates a column replacement prompt message. μ1 represents the column replacement judgment threshold, which is set in advance by the experimenter based on experience.

[0100] When the oil pump maintenance reminder module is working, the following formula is satisfied:

[0101]

[0102]

[0103] Among them, oil pump maintenance means replacing the oil and molecular sieve in the GC-MS terminal; M represents the number of days after the last maintenance that the oil pump of the GC-MS terminal should be maintained; C(p) represents the function for selecting the base number of days for oil pump maintenance; t ref represents the reference experiment times of each use of the GC / MS terminal; λ2 represents the variable conversion coefficient of the oil pump maintenance days; t ref and λ2 are both set in advance by the experimenter based on experience; p represents a schematic value indicating whether the item category of the previous maintenance includes oil pump maintenance; p=1 indicates that the item category of the previous maintenance includes oil pump maintenance; p=0 indicates that the item category of the previous maintenance does not include oil pump maintenance.

[0104] When M≥μ2, it is determined that the oil pump needs to be maintained, and the oil pump maintenance prompt module generates oil pump maintenance prompt information. μ2 represents the oil pump maintenance judgment threshold, which is set in advance by the experimenter based on experience.

[0105] When the face recognition module is working, it is combined with Figure 6 As shown, the determination method includes:

[0106] A1, obtain the face information of the current experimenter;

[0107] A2, comparing the facial information of the current experimenter with the facial information of all experimenters pre-entered in the preset facial database to confirm the identity of the current experimenter;

[0108] A3, obtain the corresponding experimenter level L according to the identity of the current experimenter;

[0109] A4, determine whether L≥N is satisfied, where N represents the level threshold of the experimenter, which is set by the experimenter with the highest level according to the actual situation;

[0110] A5: If yes, generate a sending instruction.

[0111] The contents disclosed above are only preferred feasible embodiments of the present invention, and do not limit the protection scope of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the protection scope of the present invention. In addition, the elements therein can be updated as technology develops.

Claims

1. A soil pollutant analysis and detection system, characterized in that: It comprises a gas chromatography-mass spectrometry terminal, a data processing terminal, a maintenance terminal and a display terminal; the gas chromatography-mass spectrometry terminal is used to detect sulfur-containing compounds in soil samples and generate sample detection information; the sample detection information includes mass spectrum information and total ion current chromatogram information; the data processing terminal is used to perform corresponding mass spectrum extraction operations on all chromatographic peaks according to the total mass spectrum information and the total ion current chromatogram information analysis, and generate extracted mass spectrum information corresponding to the chromatographic peaks; the display terminal is used to display the total mass spectrum information, the total ion current chromatogram information and all extracted mass spectrum information; the maintenance terminal is used to record the maintenance time and usage of the gas chromatography-mass spectrometry terminal, and generate maintenance prompt information according to the maintenance time and usage; The maintenance prompt information is displayed in the display terminal; The data processing terminal includes an extraction sequence calculation module, an extraction extension range calculation module, an extraction module, a spectral library retrieval module and a storage module; the extraction sequence calculation module is used to calculate the sequence of corresponding mass spectrum extraction operations of each chromatographic peak according to the total ion current chromatogram information, and generate extraction sequence information; the extraction extension range calculation module calculates the peak-valley horizontal coordinate extension variable of the corresponding mass spectrum extraction operation of each chromatographic peak according to the total ion current chromatogram information, and generates extension range information; the extraction module is used to perform corresponding mass spectrum extraction operations on the chromatographic peaks in sequence according to the extraction sequence information and the extension range information; the spectral library retrieval module is used to perform spectral library retrieval on the mass spectra corresponding to each chromatographic peak, and generate retrieval information; the storage module is used to save the extracted corresponding mass spectra of each chromatographic peak and the corresponding retrieval information as extracted mass spectrum information; The extraction order calculation module includes an extraction weight value calculation submodule and an extraction order confirmation submodule, wherein the extraction weight value calculation submodule is used to calculate the extraction weight value of each chromatographic peak according to the total ion current chromatogram information; the extraction order confirmation submodule is used to confirm the corresponding mass spectrum extraction order of each chromatographic peak according to the extraction weight value; When the weight value extraction calculation submodule performs calculation, the following formula is satisfied: ； in, Indicates the total ion current chromatogram information. The extraction weight value of each chromatographic peak; Indicates the total ion current chromatogram information. The relative abundance value of each chromatographic peak; Indicates the total number of chromatographic peaks in the total ion current chromatogram information; It represents the abundance weight transformation coefficient, which is set by the experimenter according to the actual situation; Represents the weight value base, which is set by the experimenter based on experience; Indicates the total ion current chromatogram information. The width of a chromatographic peak; It represents the width weight transformation coefficient, which is set by the experimenter according to the actual situation; The extraction sequence confirmation submodule is used to Sort all chromatographic peaks and confirm the corresponding mass spectrum extraction order of each chromatographic peak; The extraction extension range calculation module includes an extraction extension variable calculation submodule and an extension range proofreading submodule; the extraction extension variable calculation submodule is used to calculate the extension variables of the peak-valley horizontal coordinates of the corresponding mass spectrum extraction operation of each chromatographic peak according to the total ion current chromatogram information; the extension range proofreading submodule is used to proofread the extension range and generate corresponding extension range information; When the extraction and extension variable calculation submodule calculates, the following formula is satisfied: ； ； ； in, Indicates the total ion current chromatogram information. The horizontal coordinate expansion variable of the chromatographic peak valley extracted from the corresponding mass spectrum of each chromatographic peak; Indicates The chromatographic peak The distance between the chromatographic peaks; Indicates The chromatographic peak The distance between the chromatographic peaks; Indicates the total ion current chromatogram information. The width of a chromatographic peak; Indicates the total ion current chromatogram information. The width of a chromatographic peak; Indicates the expansion base, which is set by the experimenter according to the actual situation; Indicates The chromatographic peak valley is close to The horizontal axis value on one side of the chromatographic peak; Indicates The chromatographic peak valley is close to The horizontal axis value on one side of the chromatographic peak; Indicates The chromatographic peak valley is close to The horizontal axis value on one side of the chromatographic peak; Indicates The chromatographic peak valley is close to The horizontal axis value on one side of the chromatographic peak; When the extended range calibration submodule is working, the following formula is satisfied: ； ； ； ； ； ； in, Indicates the extraction of When the corresponding mass spectrum of the chromatographic peak is shown, the valley of the chromatographic peak in the extended range is close to the A calibration function for confirming the extended boundary value on one side of a chromatographic peak; Indicates the extraction of When the corresponding mass spectrum of the chromatographic peak is plotted, the chromatographic peak valley in the extended range after calibration is close to the The extended boundary value on one side of the chromatographic peak; Indicates The valley of the chromatographic peak is close to The first extension boundary value on one side of a chromatographic peak; Indicates The valley of the chromatographic peak is close to The second extension boundary value on one side of the chromatographic peak; The value of the ordinate at the first extended boundary value; The value representing the ordinate at the second extension boundary value; Indicates the minimum scale value of the horizontal axis in the total ion current chromatogram information; Indicates The valley of the chromatographic peak is close to The third extension boundary value on one side of the chromatographic peak; Indicates The valley of the chromatographic peak is close to The fourth extension boundary value on one side of the chromatographic peak; The value of the ordinate at the third extended boundary value; Indicates the value of the vertical coordinate at the fourth extension boundary value.

2. A soil pollutant analysis and detection system as claimed in claim 1, characterized in that: The maintenance terminal includes a maintenance record module, a usage record module and a maintenance prompt information generation module; the maintenance record module is used to record the maintenance time of the gas chromatography-mass spectrometry terminal by the experimenter and generate maintenance time information; the usage record module is used to record the usage time and usage of the gas chromatography-mass spectrometry terminal by the experimenter and generate usage information; The maintenance reminder information generation module is used to generate maintenance reminder information according to the maintenance time information and the usage information; When the maintenance prompt information generation module is working, the maintenance index is calculated using the following formula: ； ； in, represents the maintenance index; Represents the weight coefficient selection function of the previous maintenance; Indicates the number of items maintained during the previous maintenance; Indicates the maintenance reference value conversion coefficient, which is set by the experimenter according to the actual situation; Indicates the number of days between the current day and the previous maintenance; Indicates the time between the current day and the previous maintenance. The number of experiments performed using the GC / MS terminal; Indicates the total number of times the GC / MS terminal was used between the current day and the previous maintenance; Indicates the use of the reference value conversion coefficient, which is set by the experimenter according to the actual situation; Before generating maintenance reminder information, the maintenance reminder information generation module is judged by the following formula: ； in, Represents the maintenance prompt judgment function; It represents the judgment threshold, which is set by the experimenter according to the actual situation to facilitate the adjustment of the prompt sensitivity of the maintenance prompt.

3. A soil pollutant analysis and detection method, applied to a soil pollutant analysis and detection system as claimed in claim 2, characterized in that: The analytical detection method comprises: S1, performing sulfur compound detection on a soil sample to generate sample detection information; the sample detection information includes total mass spectrum information and total ion current chromatogram information; S2, performing corresponding mass spectrum extraction operations on all chromatographic peaks according to the total mass spectrum information and the total ion current chromatogram information analysis to generate extracted mass spectrum information corresponding to the chromatographic peaks; S3, displays total mass spectrum information, total ion current chromatogram information and all extracted mass spectrum information; S4, recording the maintenance time and usage of the GC / MS terminal, and generating maintenance reminder information according to the maintenance time and usage.

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