Quick Extraction Kit for Pesticide Residue Analysis
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Solution Overview
Problem
Current methods for detecting pesticide residues in agricultural products, such as the QuEChERS method, are time-consuming due to extensive sample pretreatment processes like shaking, centrifugation, and solvent treatment, making it difficult to quickly obtain a primary test liquid for analysis.
Innovation Solution
A quick extraction kit comprising a pipe with two powder mixture layers that absorb water and impurities, allowing the sample solution to flow through and produce a primary test liquid without the need for shaking and centrifugation, significantly reducing the time required for sample preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the QuEChERS method is used for sample pretreatment, then the detection accuracy is improved, but the detection time is significantly increased
Solution Approach 1:
The extraction kit divides the sample pretreatment process into two functional layers: a first powder mixture layer for initial purification and a second powder mixture layer for final cleanup. This segmentation allows simultaneous performance of multiple pretreatment functions, reducing the overall time while maintaining detection accuracy.
Solution Approach 2:
The invention combines multiple pretreatment steps (extraction, filtration, and purification) into a single integrated extraction kit. The kit merges the functions of different powder mixtures into one device, eliminating the need for separate shaking and centrifugation steps, thus reducing detection time while preserving accuracy.
2Manufacturing precision
If extensive pretreatment steps are performed, then the purity of primary test liquid is improved, but the complexity of the procedure is increased
Solution Approach 1:
The extraction kit merges multiple pretreatment functions into a single integrated device containing two powder mixture layers. This consolidation maintains the purity of the primary test liquid by performing both initial purification and final cleanup within the same kit, while significantly reducing procedural complexity by eliminating separate shaking and centrifugation steps.
Solution Approach 2:
The invention extracts and removes interfering substances from the sample through two distinct powder mixture layers. The first layer removes major interferents during initial extraction, while the second layer removes remaining impurities before the sample reaches the analytical instrument, ensuring high purity without complex procedures.
3Productivity
If traditional centrifugation and shaking steps are used, then the separation efficiency is improved, but the time required for sample preparation is increased
Solution Approach 1:
The invention replaces the mechanical centrifugation and shaking system with a passive gravity-based flow system. The sample solution naturally flows through the two powder mixture layers in the extraction kit, achieving separation and purification without requiring external mechanical energy input, thus eliminating time-consuming centrifugation and shaking steps while maintaining separation efficiency.
Solution Approach 2:
The extraction kit enables self-service sample preparation where the sample solution automatically flows through the powder mixture layers under gravity. The system performs its own separation and purification functions without requiring external mechanical intervention, reducing sample preparation time while maintaining efficient separation.
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 quick extraction kit significantly enhances the speed of obtaining a primary test liquid, reducing the overall detection time and improving the efficiency of pesticide residue analysis by eliminating the need for extensive pretreatment steps, while also reducing interference in detection results.
Implementation Method 1
The first powder mixture layer is capable of absorbing the most water of the sample solution and buffering pH value of the sample solution
Implementation Method 2
buffering pH value of the sample solution
Implementation Method 3
The second powder mixture layer is capable of absorbing the rest water of the sample solution and absorbing impurities interfering with detection of the sample solution
Data Source
AI summary
The present invention provides a quick extraction kit adapted to a procedure of detecting pesticide residues in agricultural products and a method of obtaining a primary test liquid from an agricultural sample by the quick extraction kit. The quick extraction kit comprises a pipe, a first powder mixture layer and a second powder mixture layer. The method of taking primary test liquid is performed as follows. First, obtaining fragments of the agricultural sample. Second, adding an extraction solvent into the fragments of the agricultural sample to obtain a sample solution. Third, adding the sample solution into the pipe. Finally, driving the sample solution to export from the pipe to become the primary test liquid. The quick extraction kit and the method solve the problem of being unable to quickly obtain the result of detecting pesticide residues.