Explosive Sample Headspace Transport for Sealed Optical Detection
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Solution Overview
Problem
The transport and detection of small explosive samples are challenging due to regulatory restrictions and the need for sensitive analysis, as conventional methods are expensive, time-consuming, and require specialized personnel, while transporting intact samples is prohibited by mail and delivery services.
Innovation Solution
A vial containing a small amount of explosive dissolved in a solvent is sealed within an airtight container, allowing equilibration of the explosive with the container atmosphere, enabling detection using a cavity ring-down spectrometer without opening the vial, utilizing high-sensitivity spectral analyzers to achieve parts per trillion sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods (mass spectroscopy, fluorescence, chromatography) are used, then detection sensitivity is achieved, but equipment cost, personnel training requirements, and time consumption increase significantly
Solution Approach 1:
The patent extracts only the essential detection function from complex analytical instruments by using simple optical components (light source, detector, mirrors) to measure light absorption, eliminating the need for expensive mass spectrometers, chromatographs, and other sophisticated equipment while maintaining detection capability
Solution Approach 2:
The patent employs inexpensive, easily replaceable components such as simple light sources, basic detectors, and single-use sample containers, replacing expensive, maintenance-intensive analytical instruments with cheap, disposable elements that eliminate the need for highly trained personnel and complex operational procedures
2Reliability
If intact explosive samples are transported through mail or delivery services, then sample integrity is maintained, but transportation is forbidden by regulations
Solution Approach 1:
The patent changes the physical state and concentration parameters of the explosive sample, dissolving trace amounts in solvent to create a dilute solution that falls below regulatory thresholds for prohibited materials, allowing transportation through standard mail and delivery services while maintaining sufficient concentration for detection analysis
Solution Approach 2:
The patent introduces a solvent as an intermediary substance that mediates between the explosive sample and the transportation environment, allowing the sample to be transported in a legally acceptable form (dilute solution) while preserving the ability to perform accurate detection and analysis
3Object-generated harmful factors
If miniscule amounts of explosive are transported, then regulatory restrictions are avoided, but sample integrity and sufficient condition for measurement deteriorate
Solution Approach 1:
The patent changes the concentration parameter by dissolving the explosive in solvent to create a specific dilution that satisfies regulatory requirements while maintaining sufficient analyte concentration for reliable detection, and controls the headspace volume to ensure adequate vapor phase concentration for measurement
Solution Approach 2:
The patent transitions from transporting the explosive in a single phase (solid or liquid sample) to a two-phase system with solvent and headspace vapor, allowing detection through multiple pathways (liquid phase analysis or vapor phase analysis) and ensuring sufficient sample availability for measurement while maintaining regulatory compliance
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
This method allows for safe transportation and sensitive detection of explosives without opening the container, reducing the need for extensive paperwork and enabling rapid, accurate analysis of volatile materials and narcotics.
Implementation Method 1
allowing of the explosive in the solvent in the vial to equilibrate with an atmosphere inside the airtight container
Implementation Method 2
measuring an amount of explosive using a cavity ring-down spectrometer
Data Source
AI summary
An apparatus for transporting an explosive or volatile material may include a vial configured to contain a sample of explosive dissolved in a solvent, and an airtight container which contains the vial. 0.1 mg of the explosive or volatile material may be dissolved in 0.1 ml of the solvent. The solvent may be an alcohol selected from water, methanol, ethanol, propanol, isopropanol, butanol, isobutanol, tert-butanol, acetone, methyl ethyl ketone, dimethyl sulfoxide ethylene glycol, propylene glycol, ethylene glycol monomethylether acetate or propylene glycol monomethylether acetate. A method for transporting an explosive may include providing the apparatus, dissolving 0.1 mg of the explosive in the solvent in the vial; sealing the vial in the airtight container; allowing of the explosive in the solvent in the vial to equilibrate with an atmosphere inside the airtight container; opening the airtight container; and measuring an amount of explosive using a Cavity Ring-down Spectrometer.