CN-121988195-A - Preparation method and system suitable for precipitation chemical observation and assessment water sample

CN121988195ACN 121988195 ACN121988195 ACN 121988195ACN-121988195-A

Abstract

The embodiment of the disclosure provides a preparation method and a preparation system suitable for a precipitation chemical observation and assessment water sample. The method is applied to the technical field of environmental monitoring and analysis, and comprises the steps of generating a standardized mother solution system, constructing a layering proportion regulation and non-uniform dilution and regulation strategy, simulating dynamic parameters and optimizing a process, dynamically adjusting an assessment water sample, and dynamically updating and verifying. In this way, the invention can remarkably improve the representativeness, batch repeatability and long-term stability of the check water sample and ensure the quality of precipitation chemical observation data.

Inventors

JIA XIAOFANG
TANG JIE
FANG DONGQING
Jin Junli
GAO YANG
ZHANG BENZHI
FANG BIN

Assignees

中国气象局气象探测中心

Dates

Publication Date: 20260508
Application Date: 20260302

Claims (9)

1. The preparation method of the water sample suitable for precipitation chemical observation and assessment is characterized by comprising the following steps of: determining the ion composition and the concentration range of a target water sample based on the literature investigation result of regional precipitation chemical data, and generating a standardized mother solution system; performing layering proportion regulation and control on the standardized mother liquor system, separating out basic ion components, acid-base regulation components and stability enhancement components, and generating a layering proportioning scheme based on chemical relevance of the components; according to the hierarchical proportioning scheme, key performance influence links of the water sample in the storage and transportation processes are identified and checked, and non-uniform dilution and adjustment strategies are constructed according to the precision requirements of different links; based on the non-uniform dilution and adjustment strategy, carrying out dynamic stability evaluation on the storage process of the assessment water sample, and extracting a full-parameter dynamic response spectrum; Combining the full-parameter dynamic response spectrum with a preset ion concentration drift database, optimizing a configuration scheme of preparation process parameters of the assessment water sample, and generating an assessment water sample preparation instruction set; And loading the assessment water sample preparation instruction set to a laboratory automation control system to dynamically adjust the assessment water sample.
2. The method for preparing a water sample suitable for precipitation chemistry observation and assessment according to claim 1, wherein the process of determining the ion composition and the concentration range of the target water sample based on regional precipitation chemistry data and generating a standardized mother liquor system comprises the following steps: acquiring regional precipitation chemical history monitoring data, and performing data preprocessing to obtain processed monitoring data; Processing the monitoring data by adopting a principal component analysis method through multidimensional statistical analysis, identifying main factors, carrying out cluster analysis on the main factors, and identifying typical ion composition data; Based on the ion composition data and the pH value and the conductivity of the historical precipitation, a chemometric optimization algorithm model is constructed, and the initial concentration of the needed mother solution is calculated to obtain a standardized mother solution system.
3. The method for preparing a water sample suitable for precipitation chemical observation and assessment according to claim 1, wherein the step of performing layered proportion regulation on the standardized mother liquor system to separate a basic ion component, an acid-base regulation component and a stability enhancement component and generating a layered proportioning scheme based on chemical relevance of the components is as follows: The main ion concentration in the standardized mother liquor system is extracted to form basic ion group set, the acid-base regulating reagent concentration is extracted to form acid-base regulating group set, and the bacteriostatic agent concentration is extracted to form stability enhancing group set; Establishing a concentration balance model of the basic ion group diversity and the acid-base regulation group diversity, and simultaneously establishing a drift suppression mapping model of the stability enhancement group diversity and the basic ion group diversity; And combining the output of the concentration balance model and the output of the drift suppression mapping model to generate a hierarchical proportioning scheme containing ion concentration weight factors and acid-base adjustment coefficients.
4. The method for preparing a water sample suitable for precipitation chemical observation and assessment according to claim 3, wherein the steps of identifying key performance influence links of the water sample during storage and transportation according to the hierarchical proportioning scheme, and constructing non-uniform dilution and adjustment strategies according to different link precision requirements are as follows: analyzing the ion concentration weight factors in the hierarchical proportioning scheme, and marking a section with ion concentration fluctuation exceeding a threshold value as a fluctuation section; analyzing the acid-base adjustment coefficient, and marking a section which has high buffer capacity and is insensitive to dilution or micro-component addition by the pH value as an insensitive section; A high-frequency measurement strategy is adopted for the fluctuation section, and a high-density dilution sub-strategy is generated through a proportion fine granularity segmentation strategy; a low-frequency measurement strategy is adopted for the insensitive section, and a wide-proportion dilution sub-strategy is generated through a proportion aggregation strategy; And integrating the wide-proportion dilution sub-strategy and the wide-proportion dilution sub-strategy to form a non-uniform dilution and adjustment strategy covering the full configuration flow.
5. The method for preparing a water sample suitable for precipitation chemical observation and assessment according to claim 4, wherein the process of carrying out dynamic stability assessment on the storage process of the assessment water sample based on the non-uniform dilution and adjustment strategy, and extracting the full-parameter dynamic response spectrum is as follows: Introducing the non-uniform time monitoring grid into a chemical analyzer, and loading the ion concentration weight factors in the hierarchical proportioning scheme as initial conditions and boundary conditions; Injecting a multi-point test signal into a high-density dilution sub-strategy of the fluctuation section, and collecting the associated data of ion concentration change and pH value fluctuation; Applying a periodic detection signal in a wide-proportion dilution sub-strategy of the insensitive section, and recording the distribution trend of the conductivity and the ion concentration; and integrating the associated data and the distribution trend, and constructing a full-parameter dynamic response spectrum containing the concentration-pH-stability three-dimensional relation matrix.
6. The method for preparing a water sample suitable for precipitation chemical observation and examination according to claim 5, wherein the process of combining the full-parameter dynamic response spectrum with a preset ion concentration drift database to optimize the preparation process parameter configuration scheme of the water sample to be examined and generate the preparation instruction set of the water sample to be examined is as follows: The full-parameter dynamic response spectrum is imported into a multi-objective optimization decision module, and candidate process combinations are searched in a chemical characteristic database; Calculating the chemical tolerance interval of the candidate process combination in the corresponding section according to the ion concentration change data of the fluctuation section; calculating a stability optimization threshold of the candidate process combination under the long-term storage condition according to the parameter distribution data of the insensitive section; And screening an optimal process combination based on the chemical tolerance interval and the stability optimization threshold value, generating a configuration scheme, and generating an assessment water sample preparation instruction set based on the configuration scheme.
7. The method for preparing a water sample suitable for precipitation chemical observation and assessment according to claim 3, further comprising updating and adjusting a hierarchical proportioning scheme, wherein the specific process is as follows: after the laboratory automation control system executes the dynamic adjustment operation of the check water sample, the updated chemical parameter sequence is collected again; Comparing the maximum concentration deviation values of the basic ion group diversity before and after updating, and re-triggering layering proportion regulation and control if the deviation exceeds a tolerance, and re-calibrating the concentration balance model and the drift suppression mapping model; the drift rate of change of the stability-enhanced group diversity is continuously monitored, and the non-uniform dilution and adjustment strategy is updated when the rate of change breaks through a preset window.
8. The method for preparing a water sample suitable for precipitation chemical observation and assessment according to claim 5, further comprising verifying the full-cycle physicochemical parameter variation spectrum, wherein the method comprises the following specific steps: Inputting a full-period physicochemical parameter variation spectrum generated by simulation into a chemical analyzer, and applying a periodic sweep frequency test signal homologous to the simulation at an actual output port of an examination water sample, wherein the test signal is a standard solution with known concentration injected by a precise micro pump; acquiring an actual chemical response curve and comparing the actual chemical response curve with the full-parameter dynamic response spectrum predicted value point by point; and evaluating the deviation between the predicted value and the actual value, and transmitting deviation data to the hierarchical proportioning set for readjustment when the deviation exceeds a preset threshold value.
9. A preparation system suitable for a precipitation chemical observation and assessment water sample, which realizes the preparation method suitable for the precipitation chemical observation and assessment water sample according to any one of claims 1-8, and is characterized in that the system comprises a matrix system construction module (1), a hierarchical proportioning scheme generation module (2), a strategy generation module (3), a response map extraction module (4), an assessment water sample configuration module (5) and an execution module (6); The matrix system construction module (1) is used for determining the ion composition and the concentration range of a target water sample based on the literature investigation result of regional precipitation chemical data and generating a standardized mother solution system; The hierarchical proportioning scheme generating module (2) is used for carrying out hierarchical proportion regulation and control on the standardized mother liquor system, separating out basic ion components, acid-base regulation components and stability enhancement components, and generating a hierarchical proportioning scheme based on chemical relevance of the components; The strategy generation module (3) is used for identifying key performance influence links of the checked water sample in the storage and transportation processes according to the hierarchical proportioning scheme, and constructing non-uniform dilution and adjustment strategies according to the precision requirements of different links; The response spectrum extraction module (4) is used for carrying out dynamic stability evaluation on the storage process of the assessment water sample based on the non-uniform dilution and adjustment strategy, and extracting a full-parameter dynamic response spectrum; The assessment water sample configuration module (5) is used for optimizing a configuration scheme of preparation process parameters of the assessment water sample by combining the full-parameter dynamic response spectrum with a preset ion concentration drift database, and generating an assessment water sample preparation instruction set; The execution module (6) is used for loading the assessment water sample preparation instruction set to a laboratory automation control system to dynamically adjust the assessment water sample.

Description

Preparation method and system suitable for precipitation chemical observation and assessment water sample Technical Field The disclosure relates to the technical field of environmental monitoring and analysis, in particular to a preparation method and a preparation system suitable for precipitation chemical observation and assessment water samples. Background Precipitation chemistry observation is an important means for evaluating atmospheric pollution and acid sedimentation trend, and the data quality directly influences environmental policy formulation and ecological risk evaluation. To ensure comparability of data among different laboratories, generally, a uniformly prepared unknown water sample is issued through comparison and examination among the laboratories, and the measurement capability of each participant on pH value, conductivity and main ion components (such as sulfate radical, nitrate radical, ammonium, calcium, magnesium and the like) is checked. However, the check water sample needs to highly simulate the chemical characteristics of real precipitation, and is stable in the storage and transportation processes, and high requirements are put on the scientificity and controllability of the preparation method. The existing preparation method relies on empirical mixing or single standard solution dilution, lacks a system design based on regional precipitation chemical data, and is difficult to accurately reproduce typical ion composition and acid-base characteristics. Meanwhile, the preparation process lacks standardized mother liquor system and proportion control, has poor batch repeatability, has insufficient stability control, does not effectively evaluate physical and chemical parameter drift during storage, lacks bacteriostasis measures, and has the defects of closed loop feedback in the dilution and pH adjustment links, thus easily causing conductivity deviation from a target value. These problems limit the performance of examining water samples in terms of fairness, comparability and practicality, and a scientific, stable and repeatable preparation method is needed. Disclosure of Invention The invention provides a preparation method and a preparation system suitable for precipitation chemical observation assessment water samples, and solves the technical problems of poor repeatability and low stability of the existing assessment water samples by formulating an integrated, intelligent and closed-loop feedback preparation method. According to a first aspect of the present disclosure, there is provided a formulation method suitable for precipitation chemistry observation and assessment water samples, comprising: determining the ion composition and the concentration range of a target water sample based on the literature investigation result of regional precipitation chemical data, and generating a standardized mother solution system; performing layering proportion regulation and control on the standardized mother liquor system, separating out basic ion components, acid-base regulation components and stability enhancement components, and generating a layering proportioning scheme based on chemical relevance of the components; according to the hierarchical proportioning scheme, key performance influence links of the water sample in the storage and transportation processes are identified and checked, and non-uniform dilution and adjustment strategies are constructed according to the precision requirements of different links; based on the non-uniform dilution and adjustment strategy, carrying out dynamic stability evaluation on the storage process of the assessment water sample, and extracting a full-parameter dynamic response spectrum; Combining the full-parameter dynamic response spectrum with a preset ion concentration drift database, optimizing a configuration scheme of preparation process parameters of the assessment water sample, and generating an assessment water sample preparation instruction set; And loading the assessment water sample preparation instruction set to a laboratory automation control system to dynamically adjust the assessment water sample. According to a second aspect of the disclosure, a preparation system suitable for precipitation chemical observation and assessment water samples is provided, and comprises a parent system construction module, a hierarchical proportioning scheme generation module, a strategy generation module, a response map extraction module, an assessment water sample configuration module and an execution module; the matrix system construction module is used for determining the ion composition and the concentration range of a target water sample based on the literature investigation result of regional precipitation chemical data and generating a standardized mother solution system; The hierarchical proportioning scheme generation module is used for carrying out hierarchical proportion regulation and control on the standardized mother liquor system, sepa