Integrated Preconcentrator Sensor for Rapid Hydrocarbon Trace Detection
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Solution Overview
Problem
Existing chemical sensing technologies face challenges in real-time, on-site analysis of hydrocarbon traces like BTX and ethylene due to long pre-concentration and sampling times, high power consumption, and the need for specialized expertise, limiting their applicability in portable and field applications.
Innovation Solution
Devices comprising a sensor material layer with an absorbent material layer that interacts with analytes to produce a determinable signal, allowing for simultaneous preconcentration and detection within seconds, using conductive materials like carbon-based nanostructures and absorbent materials such as functionalized cellulose acetates to enhance sensitivity and selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional preconcentration methods using polymeric or carbon-based absorbents are used, then analyte concentration is improved, but sampling time and power consumption increase significantly
Solution Approach 1:
The patent combines the preconcentration function and detection function into a single integrated device. The absorbent material layer is disposed in direct contact with the sensor material layer, allowing analytes to be concentrated and detected simultaneously without separate transfer steps. This merging of functions eliminates the time-consuming sequential operations of traditional methods while maintaining the analyte concentration capability.
Solution Approach 2:
The sensor material layer acts as an intermediary between the absorbent material layer and the external detection system. Instead of requiring thermal desorption and transfer of concentrated analytes to a separate sensor, the sensor material directly interacts with analytes from the absorbent layer through contact, enabling rapid detection without the time-consuming thermal desorption process.
2Measurement precision
If traditional preconcentration methods with thermal desorption systems are used, then analyte concentration is improved, but power consumption increases
Solution Approach 1:
The patent extracts the thermal desorption step from the preconcentration process. By placing the sensor material in direct contact with the absorbent material, the system eliminates the need for high-power thermal desorption systems. The analytes transfer directly from the absorbent layer to the sensor layer through contact, removing the energy-intensive heating and gas flow requirements of traditional thermal desorption.
Solution Approach 2:
The absorbent material layer serves its own preconcentration function while simultaneously serving as the sample source for detection. The integrated structure allows the system to self-concentrate and self-detect without requiring external high-power assistance systems, reducing overall power consumption while maintaining detection sensitivity.
3Measurement precision
If GC/MS or GC/FID techniques are used, then detection sensitivity is improved, but device complexity and operational requirements increase
Solution Approach 1:
The patent creates a simplified copy of the preconcentration-detection functionality. Instead of using complex GC/MS or GC/FID systems with multiple components (injection port, column, detector, data system), the invention uses a compact layered structure where absorbent material and sensor material are disposed in contact. This copied functionality achieves comparable detection sensitivity with dramatically reduced complexity and no specialized operational requirements.
4Measurement precision
If separate preconcentration and detection steps are used, then analyte concentration is improved, but overall process time increases
Solution Approach 1:
The patent merges the preconcentration step and detection step into a single simultaneous process. The absorbent material layer and sensor material layer are disposed in direct contact, allowing analytes to be concentrated in the absorbent layer and detected by the sensor layer at the same time. This eliminates the sequential nature of traditional methods and enables real-time analysis, dramatically improving productivity.
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, on-site, real-time detection of low-concentration analytes with improved sensitivity and selectivity, reducing the need for separate preconcentration processes and enhancing device stability and performance.
Implementation Method 1
an absorbent material layer disposed on the sensor material layer, wherein the absorbent material interacts with an analyte, if present, in a manner bringing the analyte into proximity with the sensor material
Data Source
AI summary
Embodiments described herein provide devices and methods for the determination of analytes. The device typically includes an absorbent material that allows for an analyte sample to be concentrated and analyzed simultaneously and within a short period of time (e.g., less than 10 seconds). Embodiments described herein can provide portable and easily operable devices for on-site, real time field monitoring with high sensitivity, selectivity, and fast response time.