Soil Slurry Sample Preparation for Rapid Multi-Analyte Analysis
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Solution Overview
Problem
Existing soil sampling processes are inefficient as they require drying and grinding of samples, which are time-consuming and labor-intensive, and do not allow for simultaneous analysis of multiple samples.
Innovation Solution
An automated computer-controlled sampling system that processes soil samples in their 'as collected' condition, creating a slurry with water and filtering it for chemical analysis, enabling simultaneous and rapid analysis of multiple samples for various chemical properties without the need for drying and grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional drying and grinding processes are used for soil sample preparation, then sample analysis accuracy is improved, but processing time and labor intensity increase significantly
Solution Approach 1:
The invention changes the physical state parameters of the sample preparation process by eliminating drying (temperature/time parameter change) and grinding (particle size parameter change). Instead, it uses fresh soil samples mixed with water and extractant to create a slurry that can be directly analyzed, fundamentally altering the preparation parameters from solid-state processing to liquid-state processing.
Solution Approach 2:
The invention extracts and removes the time-consuming drying and grinding steps from the traditional sample preparation sequence. By taking out these intermediate processing steps and going directly from fresh soil to slurry preparation, the method eliminates the bottleneck in the analysis workflow while maintaining analytical accuracy.
2Productivity
If traditional sequential sample processing is used, then each sample receives adequate preparation attention, but multiple samples cannot be analyzed simultaneously
Solution Approach 1:
The invention segments the sample preparation and analysis process into modular components: individual mixing chambers for each sample, separate extractant addition systems, and parallel filtration pathways. This segmentation allows multiple samples to be processed simultaneously in independent but coordinated streams, increasing throughput while managing complexity through modularity.
Solution Approach 2:
The system employs universal components that can handle multiple samples simultaneously - a single automated mixing system that can prepare multiple slurries, a shared extractant delivery system, and a common analysis platform. This multi-functionality allows the same equipment to process numerous samples in parallel, boosting productivity without proportionally increasing device complexity.
3Productivity
If drying and grinding steps are eliminated, then processing time is reduced, but sample preparation thoroughness may be compromised
Solution Approach 1:
The invention introduces water and extractant solutions as intermediary substances that facilitate the transition from solid soil to analyzable slurry without requiring drying or grinding. These liquid intermediaries enable direct chemical interaction with soil components, maintaining preparation thoroughness while eliminating mechanical processing steps.
Solution Approach 2:
The invention replaces mechanical processing methods (drying ovens and grinders) with chemical dissolution methods. Instead of mechanically breaking down soil particles through grinding, the system uses chemical extractants to dissolve and release analytes directly into the slurry, achieving thorough preparation through chemical rather than mechanical means.
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 system allows for rapid and efficient analysis of soil samples, as well as other agricultural samples like vegetation and manure, providing a comprehensive chemical profile with reduced processing time and labor, while maintaining sample integrity.
Implementation Method 1
a mixer-filter apparatus which mixes the collected raw soil sample in the 'as sampled' condition (e.g. undried and unground) with water to form a sample slurry
Implementation Method 2
The mixer-filter apparatus then filters the slurry during its extraction from the apparatus
Implementation Method 3
centrifugating the slurry sample to yield a clear supernatant
Implementation Method 4
sensing or analysis for detection of the analytes and/or chemical properties such as via colorimetric analysis
Data Source
AI summary
An automated computer-controlled sampling system and related methods for collecting, processing, and analyzing agricultural samples for various chemical properties such as plant available nutrients. The sampling system allows multiple samples to be processed and analyzed for different analytes or chemical properties in a simultaneous concurrent or semi-concurrent manner. Advantageously, the system can process soil samples in the “as collected” condition without drying or grinding. The system generally includes a sample preparation sub-system which receives soil samples collected by a probe collection sub-system and produces a slurry (i.e. mixture of soil, vegetation, and/or manure and water), and a chemical analysis sub-system which processes the prepared slurry samples for quantifying multiple analytes and/or chemical properties of the sample. The sample preparation and chemical analysis sub-systems can be used to analyze soil, vegetation, and/or manure samples.