Dual-Outlet Sample Chamber for Sensitive Laser Ablation Analysis
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Solution Overview
Problem
Existing methods for analyzing solid sample materials, particularly organic compounds, face challenges in achieving spatially and depth-resolved analysis without complex sample preparation, and when coupled with mass spectrometric devices, high fluid flow rates compromise sensitivity and resolution.
Innovation Solution
A device with a gas-tight housing and dual outlet system for fluid flow control, allowing high volume flows for efficient sample washout and low volume flows for sensitive analysis, compatible with electron impact ionization mass spectrometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high fluid flow rates are used to efficiently transport ablated sample material, then sample washout efficiency and spatial resolution are improved, but sensitivity of mass spectrometric analysis deteriorates
Solution Approach 1:
The fluid flow path is segmented into two separate outlet devices: a first outlet device for high flow rate transport of ablated material, and a second outlet device for low flow rate sensitive analysis. This segmentation allows each outlet to be optimized for its specific function, resolving the contradiction between washout efficiency and analysis sensitivity.
Solution Approach 2:
The housing with window acts as an intermediary chamber that receives ablated material from the laser, allows efficient washout through the first outlet, and simultaneously provides a controlled environment for the second outlet to extract a portion of the flow for sensitive mass spectrometric analysis. The windowed housing mediates between the high-flow ablation zone and the low-flow analysis zone.
2Productivity
If direct analysis of solid samples is performed without sample preparation, then sample throughput and time consumption are improved, but spatial and depth resolution deteriorate
Solution Approach 1:
A fluid flow system is introduced to transport ablated sample material from the laser interaction zone through the housing to the mass spectrometric device. The controlled fluid flow enables efficient removal of ablated material while maintaining the direct analysis advantage, achieving both high throughput and spatial resolution through the pneumatic transport mechanism.
3Productivity
If laser-based analysis is used for spatially and depth-resolved analysis, then analysis speed and non-destructive capability are improved, but molecular information acquisition deteriorates
Solution Approach 1:
The invention merges laser-based ablation (which provides spatial and depth resolution with high speed) with mass spectrometric analysis (which provides molecular information). The fluid flow system transports the ablated material to the mass spectrometer, combining the advantages of both techniques to achieve simultaneous spatial resolution and molecular characterization.
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 high-throughput, spatially and depth-resolved analysis of solid samples with molecular information, maintaining sensitivity and resolution suitable for organic and molecular analysis.
Implementation Method 1
Laser-material interaction achieves the ablation of solid sample material
Implementation Method 2
which is then transported to the analysis device in the form of extremely fine particles by means of a fluid flow
Implementation Method 3
the device according to the invention should therefore be suitable for use with a mass spectrometric device using electron impact ionization under vacuum conditions
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to an apparatus for accommodating and for analysing, in a spatially and depth-resolved manner, a solid sample material, the apparatus comprising a substantially gas-tight sealed housing (1) with a sample-accommodating region (2) arranged inside the housing (1), the housing (1) comprising a window (3) that is transparent to a laser beam, the apparatus having an inlet device (4) for introducing a fluid flow into the sample-accommodating region (2), and a first outlet device (5) and a second outlet device (6) for discharging the fluid flow, loaded with removed sample material, from the sample-accommodating region (2), the outlet devices (5, 6) being formed in such a way that the ratio between the fluid flow volume flows exiting from the first outlet device (5) and the fluid flow volume flows exiting from the second outlet device (6) is from 100:1 to 5000:1, in particular from 500:1 to 2000:1.