Microfluidic Diesel Detection via Thermal Decomposition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for detecting diesel in petroleum products, such as gas chromatography and XRF spectrometers, are expensive and complex, making them unsuitable for quick, field-based detection of tampering or adulteration in downstream petroleum crimes.
Innovation Solution
A microfluidic device with a substrate, reservoir, microheater, and detector is used to heat a sample, releasing a byproduct proportional to the diesel concentration, which is then detected through a pH change in a bicarbonate indicator solution, allowing for rapid and cost-effective identification of diesel presence or amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gas chromatography or XRF spectrometers are used to detect diesel, then detection precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts only the essential detection function from complex instruments like gas chromatography and XRF spectrometers, isolating the core capability to detect diesel through a simplified microfluidic system with integrated heating and detection components, thereby reducing device complexity while maintaining detection precision
Solution Approach 2:
The patent introduces a microfluidic channel as an intermediary medium that facilitates the interaction between the diesel sample and detection reagents, enabling precise detection through a controlled micro-environment without requiring complex external instrumentation
2Measurement precision
If gas chromatography or XRF spectrometers are used to detect diesel, then detection precision is improved, but cost increases
Solution Approach 1:
The patent employs disposable microfluidic chips and inexpensive detection reagents that can be easily manufactured and discarded, replacing expensive, complex instruments with low-cost single-use components that maintain detection precision while significantly reducing overall system cost
Solution Approach 2:
The patent creates a simplified copy or replica of the detection function found in expensive instruments, achieving similar detection capabilities through a microfluidic system that uses inexpensive materials and straightforward chemistry rather than costly hardware
3Reliability
If complex monitoring platforms are used to combat petroleum crimes, then detection capability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent designs the microfluidic system to perform detection functions autonomously through integrated heating, fluid transport, and detection components that automatically process samples without requiring complex external monitoring platforms or specialized operational knowledge, thereby improving ease of use while maintaining reliable detection
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 quick, field-based detection of diesel without expensive equipment, reducing downstream petroleum crime by identifying tampering or adulteration and confirming diesel presence or concentration in petroleum products.
Implementation Method 1
The microheater is configured to heat the fluid sample to a temperature at which the fluid sample releases a byproduct in response to being heated
Implementation Method 2
heating, by a microheater, a sample in a reservoir of a microfluidic device such that the sample releases a byproduct
Implementation Method 3
detecting, by a change in pH of a detector in a detection portion of the microfluidic channel of a microfluidic device, an amount of the byproduct released from the heated sample
Implementation Method 4
The pH detection medium may be configured to indicate a change in pH by a visual change, for example a color change. In some detectors, the pH detection medium is a bicarbonate indicator solution
Data Source
AI summary
A system includes a microfluidic device having a substrate, a reservoir defined in the substrate a microfluidic channel formed in the substrate, a microheater, and a detector. The reservoir is configured to store a fluid sample to be tested for the presence or absence of a compound. The microfluidic channel extends from the reservoir and includes a first portion fluidically connected to the reservoir, a second portion, and a detection portion fluidically connected between the first and second portions. The microheater is arranged adjacent to the reservoir and is configured to heat the fluid sample to a temperature at which the fluid sample releases a byproduct in response to being heated. The detector is arranged in the detector portion and is configured to indicate a presence or absence of the compound in the byproduct released from the heated sample.