Portable GI Simulator for Real-Time Metal Bioaccessibility
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Solution Overview
Problem
Current methods for quantifying bioavailability of heavy metals in soil samples are labor-intensive, time-consuming, and prone to errors, requiring large-scale laboratory equipment and specialist intervention, which hinders real-time monitoring and strategic decision-making in environmental and mining industries.
Innovation Solution
A light and portable gastrointestinal simulator system that remotely and in real-time quantifies the bioavailability of metals and metalloids like Fe, Zn, Cu, Pb, Ni, As, and Cd in contaminated soil samples, using a modular design with pH, temperature, and stirring rate sensors, and automated control systems to achieve homogeneity, facilitating efficient and cost-effective bioavailability assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laboratory methods are used to quantify bioavailability of heavy metals, then measurement precision is improved, but device complexity and loss of time increase significantly
Solution Approach 1:
The system divides the complex bioavailability analysis into three independent modular units: gastric simulation module, intestinal simulation module, and extraction module. Each module can operate autonomously and processes can be run in parallel, reducing total analysis time while maintaining measurement precision through standardized protocols in each segment.
Solution Approach 2:
The patent replaces traditional mechanical laboratory equipment (shakers, hot plates, centrifuges) with a magnetically coupled system where magnetic stirrers are driven through non-magnetic vessel walls by external magnetic fields. This eliminates mechanical seals and transmission components, enabling automated continuous operation and reducing maintenance time while maintaining mixing efficiency for accurate extraction.
2Measurement precision
If traditional laboratory equipment is used, then measurement precision is improved, but device complexity and specialist intervention requirements increase
Solution Approach 1:
The system combines multiple laboratory functions (gastric simulation, intestinal simulation, extraction, centrifugation) into a single integrated platform where all modules share common control systems, data acquisition, and analysis software. This consolidation reduces the number of separate devices and specialist interventions needed while maintaining the precision of each individual function through standardized protocols.
Solution Approach 2:
The system incorporates automated control systems that self-regulate pH, temperature, and mixing parameters based on pre-programmed protocols. The magnetic coupling system automatically maintains optimal mixing conditions without manual intervention, and the integrated software automatically processes data and generates results, reducing the need for specialist operation while maintaining measurement precision.
3Measurement precision
If manual laboratory procedures are used, then measurement precision is improved, but productivity decreases due to labor intensity
Solution Approach 1:
The system enables continuous operation where gastric simulation, intestinal simulation, and extraction processes run sequentially without interruption. Samples are automatically transferred between modules, and multiple samples can be processed simultaneously in parallel, eliminating the downtime and manual setup required in traditional batch methods. This continuous operation maintains extraction precision while significantly increasing throughput.
Solution Approach 2:
The system pre-prepares standardized gastric and intestinal simulation fluids with exact pH and composition requirements before sample analysis. All protocol parameters (mixing times, temperatures, pH values) are pre-programmed into the control system, eliminating the need for manual preparation and calibration during each analysis run. This preliminary preparation ensures consistent measurement precision while freeing up time for higher productivity.
4Measurement precision
If traditional methods are used to achieve homogeneous mixing, then measurement precision is improved, but loss of time increases due to extended mixing periods
Solution Approach 1:
The system replaces traditional mechanical stirring with magnetic coupling where magnetic stir bars are rotated by external magnetic fields applied through non-magnetic vessel walls. This provides uniform, controllable, and reproducible mixing action that achieves homogeneous extraction faster than mechanical stirrers, while eliminating the need for mechanical seals and transmission components that limit mixing speed and control precision.
Solution Approach 2:
The system dynamically adjusts mixing speed, duration, and intensity parameters based on the specific sample type and extraction requirements. Magnetic stirrers can be precisely controlled to rotate at optimal speeds for different viscosities and sample matrices, achieving complete homogenization in shorter times compared to fixed-speed mechanical stirrers. The system automatically optimizes these parameters to balance extraction precision with time efficiency.
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
Enables rapid, reliable, and cost-effective bioavailability analysis of heavy metals in soil samples, reducing specialist intervention and errors, and supporting strategic decisions in environmental and mining industries by providing real-time data for improved soil remediation and health protection.
Implementation Method 1
The system uses a magnetic coupling system to transmit motion from a magnetic stirrer, positioned outside the sampling vessel, to a magnet inside the sampling vessel
Implementation Method 2
pH sensors positioned inside the sampling vessel transmit information about the acidity or alkalinity of the solution
Implementation Method 3
temperature sensors positioned inside the sampling vessel transmit information about the temperature of the solution
Implementation Method 4
stirring rate sensors positioned inside the sampling vessel transmit information about the stirring rate of the stirring mechanism
Data Source
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AI summary
Light and potable modular gastrointestinal (GI) simulating system, and method for remotely and in real time quantifying, quantity of metal present in a contaminated soil sample, specially, tailing mining soil, which could be bioaccesible and risky to human health, wherein such metal and metalloid is selected from a group consisting of: Fe, Pb, Zn, Cu, Ni, As and Cd, comprising: a pre-mix or pre-gastric module, a mixing or gastric simulating module and GI comprising a bioreactor and stirrer of own design and a low recirculating module, wherein the mentioned first modules have sensors to temperature and stirring rate, and transmitting such data to a data center to be stored together preset values, and comparing therebetween, generating a signal of response and activating controllers to act over regulating means up to achieve such pre-set values.