Microfluidic Manifold for Temperature-Compensated Soil Analysis
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Solution Overview
Problem
Existing soil sampling processes are inefficient and require drying and grinding of samples, which complicates the analysis and delays the acquisition of valuable data for agricultural management.
Innovation Solution
A fully automated computer-controlled sampling system that processes soil samples in their 'as collected' condition, eliminating the need for drying and grinding, and allowing for simultaneous analysis of multiple samples for various chemical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional soil sampling processes are used involving drying and grinding, then sample preparation is thorough, but the analysis time is extended and device complexity increases
Solution Approach 1:
The patent applies preliminary action by performing extraction and filtration steps before the actual analysis measurement. The system prepares the soil sample by mixing with extractant, centrifuging, and filtering to create a clear supernatant in advance, so that the subsequent absorbance measurement can be performed rapidly without compromising accuracy. This preliminary preparation eliminates the need for time-consuming drying and grinding while maintaining measurement precision.
Solution Approach 2:
The patent extracts only the necessary components for analysis by using centrifugation and filtration to separate the clear supernatant containing the analytes of interest from the solid soil matrix. This extraction approach removes unnecessary solid particles that would interfere with measurement while retaining the dissolved nutrients, achieving both speed and accuracy by taking out only what is needed for the analysis.
2Measurement precision
If traditional soil sampling processes are used involving drying and grinding, then sample preparation is thorough, but device complexity and operational complexity increase
Solution Approach 1:
The patent applies universality by designing a multi-functional apparatus that combines mixing, centrifugation, filtration, and absorbance measurement in a single integrated system. The soil analysis system can process multiple samples simultaneously through parallel processing capabilities, and the same device can analyze different types of agricultural samples (soil, vegetation, manure) for various nutrients, reducing the need for multiple specialized devices while maintaining analytical accuracy.
Solution Approach 2:
The patent merges multiple sample preparation functions into a single integrated flow cell apparatus. The mixing chamber, centrifugal separation mechanism, and filtration components are combined in one device, allowing the entire sample preparation and analysis process to occur in a single operational sequence. This merging eliminates the need for separate equipment for each step, reducing overall device complexity while preserving measurement precision.
3Measurement precision
If traditional soil sampling processes are used involving drying and grinding, then sample preparation is thorough, but the number of processing steps increases
Solution Approach 1:
The patent applies continuity of useful action by implementing an uninterrupted flow process where soil samples are continuously mixed with extractant, continuously centrifuged, and continuously filtered through the system. The clear supernatant flows continuously to the absorbance measurement cell without interruption. This continuous processing eliminates idle time between steps and allows multiple samples to be processed in rapid succession, dramatically improving productivity while maintaining the precision required for accurate nutrient analysis.
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 enables rapid and continuous analysis of soil samples, providing accurate and timely data on chemical properties, which can improve crop production by optimizing soil amendments.
Implementation Method 1
an optical absorbance measurement device configured to measure an absorbance value indicative of a concentration of the analyte in the sample fluid
Implementation Method 2
a temperature sensor configured to measure a temperature of the sample fluid
Implementation Method 3
a plurality of microfluidic devices fluidly coupled together by microchannels configured to convey a sample fluid
Data Source
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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 first to produce a sample slurry. The system includes a multi-layered microfluidic manifold chemical analysis substrate configured to provide a temperature- compensated concentration of analytes or other chemical properties associated with the sample. The system utilizes a programmable controller, temperature sensor, and absorbance measurement device for that purpose. The system can be used to analyze various type of agricultural-related samples including soil, vegetation, manure, milk or other.