Passive Air Sampler Vial Adaptor for Adsorbent Transfer
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Solution Overview
Problem
Conventional passive air sampling methods for volatile organic compounds (VOCs) are cumbersome and prone to errors due to multiple steps in contaminant extraction and desorption, which can lead to inefficiencies and inaccuracies in analysis.
Innovation Solution
A passive air sampler design that allows for a single desorption step, enabling the reuse of both the badge and adsorbent material, where a vial with a measured amount of adsorbent is directly transferred to and from a chromatographic desorption tube using a vial adaptor, facilitating convenient handling and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional passive air sampling methods are used with multiple desorption steps, then contaminant extraction is performed, but the process becomes cumbersome and prone to errors
Solution Approach 1:
The patent combines the sampling badge and desorption tube into a single integrated device. The badge body serves as both the sampling chamber and the desorption tube, eliminating the need for separate transfer steps. The adsorbent is contained within the badge body, which can be directly connected to the gas chromatograph for analysis, reducing the number of操作步骤 from multiple desorption steps to a single integrated process.
Solution Approach 2:
The badge body is designed to serve multiple functions: it acts as the sampling chamber during exposure, the container for adsorbent, and the desorption tube during analysis. This multi-functional design eliminates the need for separate sampling and analysis vessels, thereby simplifying the overall process and reducing potential error sources associated with multiple transfer steps.
2Measurement precision
If conventional methods with multiple desorption steps are used, then contaminant analysis is achieved, but time consumption increases
Solution Approach 1:
By merging the sampling badge and desorption tube into one integrated device, the patent eliminates the time required for transferring adsorbent between separate containers. The direct connection capability allows the badge to be immediately connected to the gas chromatograph after sampling, significantly reducing the overall analysis time while maintaining measurement precision.
3Productivity
If adsorbent is transferred between multiple containers, then sampling and analysis are completed, but error sources increase
Solution Approach 1:
The integration of sampling and analysis functions into a single device eliminates multiple transfer operations, thereby reducing the number of potential error sources such as contamination, loss, or misplacement of adsorbent during transfer. The direct connection between the badge body and gas chromatograph ensures a closed system that maintains sample integrity throughout the analysis process.
4Adaptability or versatility
If conventional sampling badges are used, then air contaminants are sampled, but reuse of badge and sorbent material is not facilitated
Solution Approach 1:
The patent divides the device into separable components: the badge body containing the adsorbent can be detached from the gas chromatograph system. This segmentation allows the badge to be easily removed, cleaned, and refilled with fresh adsorbent for subsequent sampling campaigns, while the chromatograph system remains intact. The separable design facilitates reuse without compromising the integrity of either the sampling or analysis components.
Solution Approach 2:
The badge is designed with dynamic, changeable components including removable caps and detachable connections. These dynamic features enable the badge to transition between different states (sampling mode, analysis mode, storage mode) and facilitate easy refilling of adsorbent, thereby enhancing reusability and adaptability for multiple sampling cycles.
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 approach simplifies the sampling process, reduces errors, and allows for the efficient reuse of adsorbent materials, making it more efficient and reliable for VOC analysis.
Implementation Method 1
extraction of the contaminants such as volatile organics from the air is accomplished by adsorbents in the badge
Implementation Method 2
the container including an opening for draining to empty the particulate adsorbent by gravity from the container
Data Source
AI summary
A passive air sampler or badge suitable for wearing includes a vial adaptor to facilitate transferring granular or particulate adsorbent to and from it directly into a specially designed vial sized to accommodate a standard amount for use in a desorption tube for chromatographic or other analysis of the materials desorbed.