Dual-Head Chemical Sampling Apparatus for Trace and Bulk Analysis
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Solution Overview
Problem
Existing trace detection systems are inefficient for material identification from bulk samples, leading to cumbersome and wasteful procedures, and analytical instruments require long clean cycles when overloaded with excessive sample amounts.
Innovation Solution
A dual-purpose sampling apparatus with interchangeable trace and bulk detection heads, featuring a wand extension, trace detection head with a swab support and resistive heating, and a bulk detection head with a collector, allowing efficient collection and analysis of residues from both surfaces and bulk samples using a single apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a trace detection system is used for bulk sample analysis, then the analytical instrument can detect small amounts of analytes, but the instrument requires long clean cycles to reduce memory effect when the sample amount is too large
Solution Approach 1:
The sampling apparatus is divided into two distinct sampling heads: a trace sampling head with a large-area swab (10-100 cm²) for collecting maximum residue from surfaces, and a bulk sampling head with a small-area swab (0.1-1 cm²) for collecting minimal amounts from bulk samples. This segmentation allows the system to adapt to different sample types and prevent instrument overload.
Solution Approach 2:
The patent changes the critical parameter of swab surface area to match different sampling needs. The trace sampling head uses a large swab area (10-100 cm²) to collect maximum residue for trace analysis, while the bulk sampling head uses a small swab area (0.1-1 cm²) to collect minimal sample amounts, thereby preventing instrument overload and reducing clean cycle time.
2Measurement precision
If multiple disposable swabs are used to decrease sample amount for trace detector, then the detection sensitivity is maintained, but the procedure becomes wasteful and cumbersome
Solution Approach 1:
The sampling apparatus integrates two sampling heads (trace and bulk) into a single reusable device with a common handle and interchangeable swab mechanism. This universal design eliminates the need for multiple separate disposable swabs and procedures, reducing waste and operational complexity while maintaining detection sensitivity through appropriate head selection.
Solution Approach 2:
The sampling apparatus employs a dynamic, interchangeable head system where the user can switch between trace and bulk sampling heads based on the specific sampling task. This dynamic adaptability allows optimal sample collection for each situation without requiring multiple fixed-purpose devices or procedures.
3Adaptability or versatility
If a single sampling apparatus is used for both trace and bulk detection, then the device complexity increases, but the versatility and ease of operation improve
Solution Approach 1:
The patent merges two separate sampling devices (trace and bulk) into a single integrated apparatus with a common handle, interchangeable heads, and unified swab support mechanism. This combination reduces the number of separate devices needed while maintaining the functional simplicity of each sampling mode through modular head design.
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 collection and analysis of residues from both trace and bulk samples, minimizing instrument overload and reducing waste, with the ability to switch between modes for optimal sample handling.
Implementation Method 1
The swab support can have a resistive heating element
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A sampling apparatus includes a wand extension coupled with a trace detection head and a bulk detection head. The trace detection head collects a maximum amount of a sample for a trace detection analysis. The bulk detection head collects a minimal amount of a substance for use in bulk sample identification.