Aerosol Analysis via Electrostatic Collection and Spark Ablation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for collecting and analyzing aerosol particles are inadequate, particularly for unidentified or pollutant-containing aerosols, as they lack real-time or semi-continuous capabilities.
Innovation Solution
A method and apparatus that utilize a housing with a collection electrode and a second electrode to create a spark gap, where aerosol particles are collected and then ablated to produce atomic emissions for analysis, using a high voltage pulse generator and optical window for real-time analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional aerosol collection and analysis methods are used, then particle collection is achieved, but real-time or semi-continuous analysis capability is lacking
Solution Approach 1:
Aerosol particles are pre-collected on the tip of the collection electrode before analysis. This preliminary collection action allows subsequent rapid analysis by simply applying a spark to ablate and analyze the pre-concentrated particles, eliminating the need for continuous collection during analysis and enabling real-time or semi-continuous operation.
Solution Approach 2:
The system operates in periodic cycles: particles are collected on the electrode tip during one phase, then a high voltage spark is applied to ablate the particles for analysis in the next phase. This periodic alternation between collection and analysis modes enables continuous operation with real-time analysis capability while maintaining particle concentration through repeated collection cycles.
2Measurement precision
If a high voltage spark is applied to ablate particles on the collection electrode, then atomic emissions are produced for analysis, but particle collection efficiency may be compromised
Solution Approach 1:
Particles are collected and concentrated on the collection electrode tip before the spark ablation step. This preliminary collection ensures sufficient particle quantity is accumulated on the electrode surface, so when the spark is applied for analysis, there is enough material to produce detectable atomic emissions without needing to compromise collection efficiency.
Solution Approach 2:
The system separates the collection function and analysis function into distinct temporal phases. The collection electrode is held at a bias voltage during the collection phase to accumulate particles, then switched to high voltage spark mode for the analysis phase. This segmentation allows each function to operate at optimal conditions without interfering with the other, maintaining both collection efficiency and measurement precision.
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 efficient real-time or semi-continuous collection and analysis of aerosol particles, allowing for precise identification and monitoring of pollutants through atomic emission spectroscopy.
Implementation Method 1
A high voltage spark is applied across the spark gap so as to ablate the particles collected on the tip of the collection electrode thereby creating atomic emissions
Implementation Method 2
Ablate the particles collected on the tip of the collection electrode thereby creating atomic emissions
Implementation Method 3
the collection electrode is held at a bias voltage relative to the charged particles such that the charged particles collect on the tip of the collection electrode
Implementation Method 4
a corona may be produced by the second electrode such that the second electrode creates a cloud of ions and the particles of the aerosol are charged by the ions from the second electrode
Implementation Method 5
the second electrode may be held at a voltage sufficient to create an electrical field so as to urge the charged aerosol particles towards the tip of the collection electrode
Data Source
AI summary
Particles of a flow of aerosol are collected and analyzed by passing them through a housing having an inlet area, an outlet area, and a collection and analysis area interconnecting the inlet and outlet areas. A collection electrode has a tip disposed in the collection and analysis area and particles are collected thereon. After collection, the particles are ablated and atomic emissions are collected for analysis of the particles.