Shield Muck Surfactant Detection Without High-Temperature Drying
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Solution Overview
Problem
Current methods for detecting trace anionic surfactants in shield muck are inefficient, prone to interference, and pose safety risks due to high-temperature treatment and reagent volatility, leading to inaccurate results.
Innovation Solution
A method involving natural air-drying, selective extraction solution use, immediate filtration, and optimized detection steps using centrifuge tubes and oscillators to minimize interference and improve accuracy, safety, and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-temperature drying treatment (105°C) is applied to fresh soil for detection, then the soil can be processed for traditional detection methods, but the surfactants in the soil decompose leading to underestimated detection results
Solution Approach 1:
The patent changes the temperature parameter from high-temperature drying (105°C) to low-temperature air-drying (room temperature), preventing surfactant decomposition while still achieving moisture reduction for detection preparation
Solution Approach 2:
The patent performs preliminary air-drying of the soil sample before detection to reduce moisture content, but stops before high-temperature treatment that would cause surfactant decomposition, thus preparing the sample appropriately while preserving the analyte
2Ease of operation
If traditional extraction methods using separatory funnels are used, then extraction can be performed, but manual shaking causes gas leakage and reagent volatilization posing safety hazards to experimenters
Solution Approach 1:
The patent extracts the harmful function of manual shaking and gas leakage from the extraction process by replacing separatory funnel manual shaking with automated oscillator-based extraction using centrifuge tubes with sealed caps, eliminating the safety hazard while maintaining extraction effectiveness
Solution Approach 2:
The patent replaces the mechanical manual shaking operation with automated oscillation using a horizontal oscillator, eliminating human exposure to volatile reagents while achieving effective mixing and extraction
3Measurement precision
If conventional detection methods are used, then detection can be performed, but reagent consumption per single detection is very high
Solution Approach 1:
The patent optimizes reagent volumes and concentrations for the extraction and detection steps, reducing the total amount of reagents required per detection while maintaining effective extraction and accurate measurement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves rapid, accurate, and safe detection of anionic surfactants in shield muck with a recovery rate of 96.3%-104.5%, reducing reagent consumption and operational hazards.
Implementation Method 1
placing the shield muck soil sample in a centrifuge tube, adding an extraction solution, oscillating in a horizontal oscillator
Implementation Method 2
performing water bath distillation to obtain a test solution
Implementation Method 3
adding dichloromethane to mixture 2, fixing on a vertical oscillator for oscillation, and standing for layering after oscillation
Implementation Method 4
measuring absorbance of the system at a wavelength of 652 nm
Data Source
AI summary
The present disclosure relates to the technical field of shield muck detection, specifically relating to a method for identifying and detecting trace pollutants in shield muck, including the following steps: Step S1. pre-treating shield muck; Step S2. extracting anionic surfactant; Step S3. removing interfering components; Step S4. detecting anionic surfactant; Step S5. calculating anionic surfactant content. The present disclosure directly uses fresh shield muck for extraction, avoiding the decomposition phenomenon of anionic surfactants caused by high-temperature drying in traditional methods, significantly improving the accuracy of detection results, and utilizing a laboratory oscillator to batch process 10-20 samples at once, simplifying operation steps, while reducing reagent consumption, and effectively avoiding the problem of gas leakage in separatory funnels, improving operational efficiency and safety of experimenters, enabling rapid and efficient completion of extraction of anionic surfactants in soil, having broad application prospects.